Precise temperature control in microfluidic devices using Joule heating of ionic liquids

Lab on a Chip ◽  
2004 ◽  
Vol 4 (5) ◽  
pp. 417 ◽  
Author(s):  
Andrew J. de Mello ◽  
Matthew Habgood ◽  
N. Llewellyn Lancaster ◽  
Tom Welton ◽  
Robert C. R. Wootton
Keyword(s):  
Ionic Liquids ◽  
Temperature Control ◽  
Joule Heating ◽  
Microfluidic Devices

scholarly journals Flow control in microfluidics devices: electro-osmotic Couette flow with joule heating effect

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
C. Ahamed Saleel ◽  
Saad Ayed Alshahrani ◽  
Asif Afzal ◽  
Maughal Ahmed Ali Baig ◽  
Sarfaraz Kamangar ◽  
...  
Keyword(s):  
Flow Control ◽  
Couette Flow ◽  
Joule Heating ◽  
Dynamic Viscosity ◽  
Microfluidic Devices ◽  
Heating Effect ◽  
Content Type ◽  
Osmotic Flow ◽  
Joule Heating Effect ◽  
Electro Osmotic Flow

PurposeJoule heating effect is a pervasive phenomenon in electro-osmotic flow because of the applied electric field and fluid electrical resistivity across the microchannels. Its effect in electro-osmotic flow field is an important mechanism to control the flow inside the microchannels and it includes numerous applications.Design/methodology/approachThis research article details the numerical investigation on alterations in the profile of stream wise velocity of simple Couette-electroosmotic flow and pressure driven electro-osmotic Couette flow by the dynamic viscosity variations happened due to the Joule heating effect throughout the dielectric fluid usually observed in various microfluidic devices.FindingsThe advantages of the Joule heating effect are not only to control the velocity in microchannels but also to act as an active method to enhance the mixing efficiency. The results of numerical investigations reveal that the thermal field due to Joule heating effect causes considerable variation of dynamic viscosity across the microchannel to initiate a shear flow when EDL (Electrical Double Layer) thickness is increased and is being varied across the channel.Originality/valueThis research work suggest how joule heating can be used as en effective mechanism for flow control in microfluidic devices.

scholarly journals Ionic liquids as an enabling tool to integrate reaction and separation processes

2019 ◽  
Vol 21 (24) ◽  
pp. 6527-6544 ◽  
Author(s):  
Rocio Villa ◽  
Elena Alvarez ◽  
Raul Porcar ◽  
Eduardo Garcia-Verdugo ◽  
Santiago V. Luis ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microfluidic Devices ◽  
Chemical Processes ◽  
Membrane Reactors ◽  
Separation Processes ◽  
Catalytic Systems

This tutorial review highlights representative examples of ionic liquid (IL)-based (bio)catalytic systems integrating reaction and separation, as a tool for the development of sustainable chemical processes (e.g. IL/scCO2 biphasic reactors, membrane reactors, nanodrop systems, microfluidic devices, supported IL phases, sponge-like ILs, etc.).

Chemical and physical processes for integrated temperature control in microfluidic devices

Lab on a Chip ◽  
2003 ◽  
Vol 3 (1) ◽  
pp. 1 ◽  
Author(s):  
Rosanne M. Guijt ◽  
Arash Dodge ◽  
Gijs W. K. van Dedem ◽  
Nico F. de Rooij ◽  
Elisabeth Verpoorte
Keyword(s):  
Temperature Control ◽  
Microfluidic Devices ◽  
Physical Processes

scholarly journals Numerical Study of Joule Heating Effects on Microfluidics Device Reliability in Electrode Based Devices

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5819
Author(s):  
Caffiyar Mohammed Yousuff ◽  
Vineet Tirth ◽  
Mohamed Zackria Ansar Babu Irshad ◽  
Kashif Irshad ◽  
Ali Algahtani ◽  
...  
Keyword(s):  
Cross Sections ◽  
Joule Heating ◽  
Electrode Materials ◽  
Separation Efficiency ◽  
Numerical Study ◽  
Microfluidic Devices ◽  
Cell Loss ◽  
Heating Effects ◽  
Device Reliability ◽  
Micro Channels

In electrode-based microfluidic devices, micro channels having narrow cross sections generate undesirable temperature inside the microfluidic device causing strong thermal distribution (joule heating) that eventually leads to device damage or cell loss. In this work, we investigate the effects of joule heating due to different electrode configuration and found that, electrodes with triangular arrangements produce less heating effect even at applied potential of 30 V, without compromising the performance of the device and separation efficiency. However, certain electrode materials have low thermal gradients but erode the channel quickly thereby affecting the reliability of the device. Our simulation also predicts optimal medium conductivity (10 mS/m with 10 V) for cells to survive inside the channel until they are selectively isolated into the collection outlet. Our investigations will aid the researchers in the designing of efficient and reliable microfluidic devices to overcome joule heating inside the microchannels.

Integrated Temperature Control System for Microfluidic Devices

2002 ◽  
pp. 617-619
Author(s):  
A. Dodge ◽  
R. M. Guijt ◽  
G. W. K. van Dedem ◽  
N. F. de Rooij ◽  
E. Verpoorte
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Microfluidic Devices ◽  
Temperature Control System

scholarly journals Preparation of monodisperse hybrid gel particles with various morphologies via flow rate and temperature control

Soft Matter ◽  
2019 ◽  
Vol 15 (35) ◽  
pp. 6934-6937 ◽  
Author(s):  
Toshimitsu Kanai ◽  
Hiroki Nakai ◽  
Ayaka Yamada ◽  
Masafumi Fukuyama ◽  
David A. Weitz
Keyword(s):  
Temperature Control ◽  
Flow Rate ◽  
Microfluidic Devices ◽  
Hybrid Gel ◽  
Gel Particles

We report a facile method for preparing monodisperse hybrid smart gel particles with various morphologies by using microfluidic devices.

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