DE10213003B4 - Micromixer and method for mixing at least two liquids and using micromixers - Google Patents
Micromixer and method for mixing at least two liquids and using micromixers Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0093—Microreactors, e.g. miniaturised or microfabricated reactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4319—Tubular elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
- B01F25/431971—Mounted on the wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
- B01F25/4331—Mixers with bended, curved, coiled, wounded mixing tubes or comprising elements for bending the flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/30—Micromixers
- B01F33/3031—Micromixers using electro-hydrodynamic [EHD] or electro-kinetic [EKI] phenomena to mix or move the fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0418—Geometrical information
- B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0436—Operational information
- B01F2215/0445—Numerical electrical values, e.g. intensity, voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0436—Operational information
- B01F2215/0454—Numerical frequency values
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0436—Operational information
- B01F2215/0459—Numerical values of dimensionless numbers, i.e. Re, Pr, Nu, transfer coefficients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00889—Mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00925—Irradiation
- B01J2219/0093—Electric or magnetic energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Mikromischer zum Mischen von mindestens zwei Flüssigkeiten, bestehend aus einer Mischstrecke mit mindestens einer Zuleitung und einer Ableitung, wobei die Mischstrecke so ausgestaltet ist, dass mindestens ein Teil des Flüssigkeitsstroms umgelenkt wird und eine Richtungsänderung erfährt und an der Mischstrecke Mittel zur Erzeugung eines elektrischen Feldes im Bereich der Richtungsänderung vorhanden sind und im Bereich der Umlenkung ein Material verwendet wird, welches mit mindestens einer der Flüssigkeiten eine elektrische Doppelschicht erzeugt, und die Grenzfläche zwischen den Flüssigkeiten aufgefaltet wird.micromixer for mixing at least two liquids, consisting of one Mixing section with at least one supply line and a derivative, wherein the mixing section is designed such that at least a part of the liquid flow is deflected and undergoes a change in direction and at the mixing section means for generating an electric field in the region of the direction change are present and uses a material in the area of the deflection is, which with at least one of the liquids an electric Double layer generated, and the interface between the liquids unfolded.
Description
Die Erfindung betrifft einen Mikromischer und ein Verfahren zum Mischen von mindestens zwei Flüssigkeiten und die Verwendung von Mikromischern.The The invention relates to a micromixer and a method for mixing of at least two liquids and the use of micromixers.
Die Vermischung von zwei oder mehreren Flüssigkeiten vollzieht sich in zwei Schritten. Zuerst wird durch eine geeignete Strömung die Austauschfläche zwischen den Flüssigkeiten vergrößert; danach wird die Vermischung durch Diffusion auf molekularer Längenskala vollendet. Dabei wird die Diffusion durch die große Austauschfläche sehr effizient, so daß der Mischvorgang schnell abgeschlossen wird.The Mixing of two or more liquids takes place in two steps. First, by a suitable flow the exchange area between the liquids increased; after that is the mixing by diffusion on the molecular length scale completed. The diffusion through the large exchange surface is very efficient, so that the Mixing process is completed quickly.
In makroskopischen Mischern wird die Vergrößerung der Austauschfläche durch Turbulenz oder durch mechanische Rührwerke realisiert. Mikroströmungen hingegen sind in der Regel laminar. Deshalb ist die Vergrößerung der Austauschfläche nicht durch Turbulenz zu erreichen. Mechanische Rühranlagen mit beweglichen Teilen sind in Mikromischern kaum realisierbar. Die Vergrößerung der Austauschfläche stellt sich in Mikromischern deshalb besonders schwierig dar.In Macroscopic mixers increase the size of the exchange surface Turbulence or realized by mechanical agitators. Microflows on the other hand are usually laminar. Therefore, the enlargement of the exchange surface is not through To reach turbulence. Mechanical stirrers with moving parts are hardly feasible in micromixers. The enlargement of the exchange area is therefore particularly difficult in micromixers.
Aus
der
Mikromischer mit Perlen erfordern das Einbringen bewegter mechanischer Teile sowie eine zugehörige Mischkammer und ein extern angelegtes magnetisches Feld. Das Einbringen der Perlen ist zum einen aufwendig und zum anderen sind die bewegten Teile störanfällig durch Verkleben oder Verstopfen der Austrittskanäle. Das zusätzliche Tot-Volumen der Mischkammer ist unerwünscht und bedingt erhöhte Kosten bei teuren Flüssigkeiten.micromixer with beads require the introduction of moving mechanical parts as well as an associated one Mixing chamber and an externally applied magnetic field. The introduction The pearls are on the one hand elaborate and on the other are the moving Parts susceptible to failure Sticking or clogging of the outlet channels. The additional dead volume of the mixing chamber is undesirable and conditionally increased Cost of expensive liquids.
Des
Weiteren sind aus der
Weiterhin wurden in Oddy, M. H.; Santiago, J. G.; Mikkelsen, J. C.: Electrokinetic Instability Micromixing. In: Analytical Chemistry, Vol. 73, No. 24,s. 5822-5832 (2001), Mikromischer offenbart, welche ein periodisch oszillierendes elektrisches Feld, das tangential zur Hauptströmungsrichtung angelegt ist, zur Mischung von Flüssigkeiten verwenden. Zum effektiven Betrieb des Mikromischers wird hierbei die Flüssigkeitsströmung durch zusätzliche Flüssigkeitsstrahlen, die mittels elektrischer Kräfte aus Seitenkanälen in die Mischkammer getrieben werden, beeinflusst. Um die Seitenkanäle zu befüllen, entsteht dadurch ein Bedarf an zusätzlicher Flüssigkeit und es treten Unsicherheiten bezüglich der wahren Zusammensetzung des Gemischs auf.Farther were in Oddy, M. H .; Santiago, J.G .; Mikkelsen, J. C .: Electrokinetic Instability Micromixing. In: Analytical Chemistry, Vol. 73, no. 24, s. 5822-5832 (2001) discloses micromixers which are periodically oscillating electric field tangential to the main flow direction is used to mix liquids. To the effective Operation of the micromixer here is the liquid flow through additional Liquid jets, the by means of electrical forces from side channels are driven into the mixing chamber, influenced. To fill the side channels arises thereby a need for additional liquid and there are uncertainties the true composition of the mixture.
Aufgabe der Erfindung ist es, einen Mikromischer zum Mischen von mindestens zwei Flüssigkeiten mit geringem Tot-Volumen und einfachem Aufbau und Verfahren zum Mischen von mindestens zwei Flüssigkeiten bei geringem Tot-Volumen bereitzustellen.task The invention is a micromixer for mixing at least two liquids with low dead volume and simple design and method for Mix at least two liquids provide at low dead volume.
Gelöst wird diese Aufgabe durch die Merkmale der Patentansprüche 1 und 5, der Anspruch 10 nennt eine vorteilhafte Verwendung der Mikromischer.Is solved This object is achieved by the features of claims 1 and 5, the claim 10 an advantageous use of the micromixer.
Die Unteransprüche beschreiben vorteilhafte Ausgestaltungen der Erfindung.The under claims describe advantageous embodiments of the invention.
Aufgrund fehlender Turbulenz und fehlender mechanischer Rühranlage muss eine geeignete Strömung zur Vergrößerung der Austauschfläche in Mikromischern von außen erzwungen werden. Dazu werden in der vorliegenden Erfindung die elektrischen Doppelschichten (EDL) zwischen Flüssigkeit und Wand ausgenutzt. In dünnen Schichten unmittelbar an der Wand ist die Flüssigkeit elektrisch nicht neutral, so dass angelegte elektrische Felder Kräfte auf die Flüssigkeitsschichten in Wandnähe bewirken. Eine optimale Strömung zur Vergrößerung der Austauschfläche entsteht, wenn die elektrischen Kräfte (und damit das angelegte elektrische Feld) zeitlich periodisch auftreten und normal zur Hauptströmung orientiert sind. Die Frequenz des angelegten elektrischen Feldes besitzt ein Optimum, wenn es mit der inneren Zeitskala der Strömung in Resonanz ist. Die normale Orientierung der elektrischen Kräfte zur Hauptströmung wird an Wänden erhalten, die normal zur Hauptströmung stehen. Demnach ist entweder eine Auffaltung des Kanals oder ein Kanaleinbau geeignet, solche Kräfte zu erhalten. Die mehrfache Auffaltung des Kanals oder das mehrfache Einbringen von Kanaleinbau ten kann bei Beachtung der inneren Längenskala der Strömung ebenfalls optimiert werden. Zusammenfassend erzeugt somit das normal oszillierende, elektrische Feld eine Sekundärströmung, die bei Optimierung der Parameter eine sehr effiziente Vergrößerung der Austauschfläche bewirkt. Damit kann nach Wirkung der Diffusion eine sehr effiziente Vermischung erhalten werden. Ein weiteres wichtiges Merkmal der vorliegenden Erfindung ist die Möglichkeit, die Intensität der Vermischung durch die Stärke des angelegten elektrischen Feldes zu steuern.Due to lack of turbulence and lack of a mechanical stirring system, a suitable flow must be forced to increase the exchange area in micromixers from the outside. For this purpose, in the present invention, the electrical double layers (EDL) between liquid and wall are utilized. In thin layers directly on the wall, the liquid is not electrically neutral so that applied electric fields cause forces on the liquid layers near the wall. An optimal flow to increase the exchange surface arises when the electrical forces (and thus the applied electric field) occur periodically periodically and are oriented normal to the main flow. The frequency of the applied electric field has an optimum when it resonates with the inner time scale of the flow. The normal orientation of the electrical forces to the main flow is obtained on walls that are normal to the main flow. Accordingly, either a folding of the channel or a channel installation is suitable to obtain such forces. The multiple unfolding of the channel or the multiple introduction of Kanaleinbau th can also be optimized considering the inner length scale of the flow. In summary, the normally oscillating electric field thus generates a secondary current which, when the parameters are optimized, brings about a very efficient enlargement of the exchange surface. Thus, after the effect of the diffusion, a very efficient mixing can be obtained. Another important feature of the present invention is the ability to control the intensity of mixing by the magnitude of the applied electric field.
Ein besonderer Vorteil besteht darin, dass das Funktionsprinzip keine bewegten Teile, kein zusätzliches Tot-Volumen und keine komplexe Flüssigkeitsführung benötigt. Damit wird ein einfacher, ebener Aufbau der Kanäle möglich, verbunden mit kostengünstiger (Massen-) Fertigung beispielsweise durch Heißprägen in Kunststoff. Das elektrische Feld kann entweder durch eine äußere Kapazität oder durch Integration der Kapazität in den Kunststoff erzeugt werden. Die Stärke des elektrischen Feldes erlaubt es zusätzlich, die Intensität der Vermischung zu steuern.One particular advantage is that the functional principle no moving parts, no additional Dead volume and no complex liquid guidance needed. This will make a simple, level construction of the channels possible, connected with cheaper (Mass) production, for example by hot stamping in plastic. The electric Field can either be through an outside capacity or through Integration of capacity be generated in the plastic. The strength of the electric field additionally allows the intensity to control the mixing.
Aufgrund der geringen Tot-Volumina eignen sich die Mikromischer auch als Komponenten für Mikroreaktoren für Reaktionen bei denen geringe Mengen umgesetzt werden, wie in der Mikrobiologie, der Gentechnik, der Pharmakologie oder bei Mikroreaktionen in der Chemie.by virtue of the low dead volumes, the micromixers are also suitable as Components for Microreactors for Reactions in which small amounts are reacted, as in the Microbiology, genetic engineering, pharmacology or microreactions in chemistry.
Die Erfindung wird im Folgenden anhand zweier Ausführungsbeispiele mit Hilfe der Figuren näher erläutert.The Invention will be described below with reference to two embodiments with the aid of Figures closer explained.
Dabei
zeigt die
Die
Kondensatorplatten
Ausführungsbeispiel
gefalteter Mischkanal mit folgenden Parametern:
Volumenstrom
dV/dt = 100 nl/s
mittlere Geschwindigkeit u0 =
0.01 m/s
Kanalweite d0 = 100 μm
wässrige Lösungen,
Kunststoff-Chip
Erregungsfrequenz f = 10 Hz
Feldstärke Ê = 20 V/mmExemplary embodiment of a folded mixing channel with the following parameters:
Volume flow dV / dt = 100 nl / s
mean velocity u 0 = 0.01 m / s
Channel width d 0 = 100 μm
aqueous solutions, plastic chip
Excitation frequency f = 10 Hz
Field strength Ê = 20 V / mm
Durch Auffaltung eines gestreckten Kanals mit 2 zu mischenden, geschichteten Flüssigkeitsströmen kann durch Anlegen eines vertikalen elektrischen Wechselfeldes eine entscheidende Verbesserung der Vermischung erzielt werden. Dies wird aus einem Vergleich der Konzentrationsfelder mit und ohne elektrisches Wechselfeld deutlich: An Wänden, welche vertikal und somit parallel zum elektrischen Feld stehen, werden durch elektrische Kräfte wandnahe Flüssigkeitsschichten periodisch in den Kern der Strömung transportiert. Dadurch wird die Grenzfläche zwischen den Flüssigkeiten stark verzerrt, verlängert und aufgefaltet. Infolge der Verlängerung und Auffaltung der Grenzflächen erhöht sich die Diffusionsfläche zwischen den Flüssigkeiten, was die Durchmischung deutlich verbessert.By Unfolding a stretched channel with 2 layers to be mixed Liquid flow can by applying a vertical alternating electric field a crucial Improvement of mixing can be achieved. This will be one Comparison of the concentration fields with and without alternating electric field clearly: On walls, which vertically and thus parallel to the electric field by electrical forces near-wall liquid layers periodically into the core of the flow transported. This will be the interface between the liquids heavily distorted, lengthened and unfolded. As a result of the extension and unfolding of the interfaces elevated the diffusion surface between the liquids, which improves the mixing significantly.
Die
Bei
den
Ausführungsbeispiel
Mischkanal mit Einbauten mit folgenden Parametern:
Volumenstrom
dV/dt = 100 nl/s
mittlere Geschwindigkeit u0 =
0.01 m/s
Kanalweite d0 = 100 μm
Zylinderdurchmesser
dzyl ≈ 7.5 μm
wässrige Lösungen,
Kunststoff-Chip
Erregungsfrequenz f = 10 Hz
Feldstärke Ê = 50 V/mmExemplary mixing channel with internals with the following parameters:
Volume flow dV / dt = 100 nl / s
mean velocity u 0 = 0.01 m / s
Channel width d 0 = 100 μm
Cylinder diameter d zyl ≈ 7.5 μm
aqueous solutions, plastic chip
Excitation frequency f = 10 Hz
Field strength Ê = 50 V / mm
Anhand des Beispiels eines Zylinders wird die Wirkungsweise bei vorhandenen Einbauten verdeutlicht. Durch Anlegen eines vertikalen Wechselfeldes wird die Vermischung der geschichtet strömenden, zu mischenden Flüssigkeiten deutlich verbessert (vgl. Konzentrationsfeld). In unmittelbarer Wandnähe des Zylinders werden die Flüssigkeiten jeweils durch die periodischen elektrischen Kräfte wechselseitig vertikal in die Umströmung getrieben. Diese Flüssigkeitsstrahlen, welche durch die Hauptströmung zu Wirbeln aufgerollt werden, lösen vom Zylinder ab und werden mit der Hauptströmung stromab geschwemmt. Durch diese Vorgänge faltet sich die Grenzfläche zwischen den Flüssigkeiten stark auf und wird verlängert. Dadurch wird die Effizienz der Diffusion wesentlich gesteigert. Als Einbau kann neben dem Zylinder auch jede andere Form verwendet werden.Based on the example of a cylinder, the effect of existing installations is illustrated. By applying a vertical alternating field, the mixing of the layered, flowing liquids to be mixed is significantly improved (see concentration field). In the immediate vicinity of the wall of the cylinder, the liquids are each driven by the periodic electrical forces mutually vertically into the flow around. These liquid jets, which are rolled up into eddies by the main flow, detach from the cylinder and are swept downstream with the main flow. As a result of these processes, the interface between the liquids folds up greatly and is lengthened. This will increase the efficiency of Diffusion significantly increased. As an installation, any other shape can be used in addition to the cylinder.
Die
Die Realisierung eines Mischkanals mit Einbauten wird in der Praxis nicht auf einzelne und kreisrunde Einbauten beschränkt werden. Vielmehr verbessern mehrere, größere Einbauten in Resonanzabstand bei allgemeiner Form die Vermischung weiter und stellen gleichzeitig eine einfache, billige Fertigung sicher.The Realization of a mixing channel with internals is in practice not limited to individual and circular installations. Rather, improve several, larger installations in resonance distance with general form the mixing further and At the same time ensure simple, cheap production.
Folgende
Parameterbereiche sind möglich:
Reynolds-Zahl
Re = u0d0/v = 0.05 ÷ 50
Debye-Länge lD = 0.1 ÷ 1 μm
Geschwindigkeiten u0 = 0.001 ÷ 0.1 m/s
elektrische
Feldstärke Ê = 1 ÷ 1000
V/mm
geometrische Abmessungen d0 =
50 ÷ 500 μm
geometrische
Winkel für
querstehende Wände α = 30 ÷ 150°
externe
Anregungsfrequenz ω =
0.2 Hz ÷ 20
HzThe following parameter ranges are possible:
Reynolds number Re = u 0 d 0 / v = 0.05 ÷ 50
Debye length l D = 0.1 ÷ 1 μm
Velocities u 0 = 0.001 ÷ 0.1 m / s
electric field strength Ê = 1 ÷ 1000 V / mm
geometric dimensions d 0 = 50 ÷ 500 μm
geometric angles for transverse walls α = 30 ÷ 150 °
external excitation frequency ω = 0.2 Hz ÷ 20 Hz
Folgende
Materialien sind möglich:
Kanal
aus Kunststoff (elektrisch nichtleitend!), Flüssigkeit beliebig wenn sich
nur eine elektrische Doppelschicht ausbildet (z. B. Wasser, wäßrige Lösungen,
Salzlösungen,
Alkohole, organische Flüssigkeiten)The following materials are possible:
Plastic channel (electrically non-conductive!), Liquid arbitrary if only one electrical double layer is formed (eg water, aqueous solutions, salt solutions, alcohols, organic liquids)
Anwendungsbeispiele sind: Herstellung von chemischen Substanzen (Mikroreaktoren), biologische und chemische Analytik (Protein-Analyse, DNA-Analyse: „Sanger sequencing," „polymerase-assisted amplification", „restriction endonuclease digestion"), „high-throughput screening"applications are: production of chemical substances (microreactors), biological and chemical analysis (protein analysis, DNA analysis: "Sanger sequencing, "" polymerase-assisted amplification "," restriction endonuclease digestion ")," high-throughput screening "
Claims (10)
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Application Number | Priority Date | Filing Date | Title |
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DE10213003A DE10213003B4 (en) | 2002-03-22 | 2002-03-22 | Micromixer and method for mixing at least two liquids and using micromixers |
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---|---|---|---|
DE10213003A DE10213003B4 (en) | 2002-03-22 | 2002-03-22 | Micromixer and method for mixing at least two liquids and using micromixers |
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DE10213003A1 DE10213003A1 (en) | 2003-10-16 |
DE10213003B4 true DE10213003B4 (en) | 2006-08-03 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007013932A1 (en) | 2007-03-23 | 2008-09-25 | Forschungszentrum Karlsruhe Gmbh | Mixer for two or more liquids, for use in microfluid apparatus for chemical and biochemical analysis, comprises at least three linked T-mixer units, periodic pressure-driven or electroosmotic flow being imposed on basic flow through mixer |
US7691331B2 (en) | 2005-09-09 | 2010-04-06 | Rhodia Chimie | Microfluidic flow device and method for use thereof |
DE102012210712A1 (en) | 2012-06-25 | 2014-01-02 | Carl Zeiss Smt Gmbh | Method and cooling system for cooling an optical element for EUV applications |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2005075062A1 (en) * | 2004-01-29 | 2005-08-18 | Agilent Technologies, Inc. | Mixing of fluids |
KR100571845B1 (en) * | 2004-10-28 | 2006-04-17 | 삼성전자주식회사 | Method of mixing fluids and mixing apparatus using the method |
Citations (3)
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DE19728520A1 (en) * | 1997-07-04 | 1999-01-07 | Imb Inst Fuer Molekulare Biote | Switchable dynamic micromixer with minimal dead volume |
DE19927556A1 (en) * | 1999-06-16 | 2000-12-28 | Inst Mikrotechnik Mainz Gmbh | Static micro mixer for producing emulsions and gas-liquid dispersions has a housing with fluid inlets, a fluid outlet and plates stacked in the housing |
DE19927554A1 (en) * | 1999-06-16 | 2000-12-28 | Inst Mikrotechnik Mainz Gmbh | Micromixer |
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2002
- 2002-03-22 DE DE10213003A patent/DE10213003B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19728520A1 (en) * | 1997-07-04 | 1999-01-07 | Imb Inst Fuer Molekulare Biote | Switchable dynamic micromixer with minimal dead volume |
DE19927556A1 (en) * | 1999-06-16 | 2000-12-28 | Inst Mikrotechnik Mainz Gmbh | Static micro mixer for producing emulsions and gas-liquid dispersions has a housing with fluid inlets, a fluid outlet and plates stacked in the housing |
DE19927554A1 (en) * | 1999-06-16 | 2000-12-28 | Inst Mikrotechnik Mainz Gmbh | Micromixer |
Non-Patent Citations (1)
Title |
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ODDY, M.H., SANTIAGO, J.G., MIKKELSEN, J.C.: Electrokinetic Instability Micromixing. In: Analytical Chemistry, Vol. 73, No. 24, (2001), S. 5822-5832 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7691331B2 (en) | 2005-09-09 | 2010-04-06 | Rhodia Chimie | Microfluidic flow device and method for use thereof |
DE102007013932A1 (en) | 2007-03-23 | 2008-09-25 | Forschungszentrum Karlsruhe Gmbh | Mixer for two or more liquids, for use in microfluid apparatus for chemical and biochemical analysis, comprises at least three linked T-mixer units, periodic pressure-driven or electroosmotic flow being imposed on basic flow through mixer |
DE102012210712A1 (en) | 2012-06-25 | 2014-01-02 | Carl Zeiss Smt Gmbh | Method and cooling system for cooling an optical element for EUV applications |
US9671584B2 (en) | 2012-06-25 | 2017-06-06 | Carl Zeiss Smt Gmbh | Method and cooling system for cooling an optical element for EUV applications |
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DE10213003A1 (en) | 2003-10-16 |
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Effective date: 20121002 |