The Experts below are selected from a list of 10539 Experts worldwide ranked by ideXlab platform
Suresh V Garimella - One of the best experts on this subject based on the ideXlab platform.
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induction electrohydrodynamics Micropump for high heat flux cooling
Sensors and Actuators A-physical, 2007Co-Authors: Vishal Singhal, Suresh V GarimellaAbstract:Induction electrohydrodynamics (EHD) has been investigated as a possible means of pumping liquids through microchannel heat sinks for cooling microprocessors. A pump utilizing induction EHD has been microfabricated and tested. The experimental results matched the predictions from correlations to within 30%. Based on this, a Micropump has been designed which is miniaturizable to a level where it can be integrated into the microchannels. The Micropump utilizes a vibrating diaphragm along with induction EHD for pumping. The vibrating diaphragm does not cause any net flow by itself but causes high local bulk fluid velocities which lead to an increase in the power drawn from the electrodes and an increase in efficiency of EHD, both of which lead to a higher flow rate. The performance of the pump is predicted using an experimentally validated numerical model. The numerical model solves the three-dimensional transient fluid flow and charge transport problem due to simultaneous actuation of EHD and the vibrating diaphragm. Numerical results for Micropumps integrated into trapezoidal microchannels are presented. The results indicate that the proposed Micropump design has significant potential for microelectronics cooling applications: It is easy and inexpensive to fabricate, needs no added space, and can achieve the high flow rates needed.
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induction electrohydrodynamics Micropump for high heat flux cooling
Sensors and Actuators A-physical, 2007Co-Authors: Vishal Singhal, Suresh V GarimellaAbstract:Induction electrohydrodynamics (EHD) has been investigated as a possible means of pumping liquids through microchannel heat sinks for cooling microprocessors. A pump utilizing induction EHD has been microfabricated and tested. The experimental results matched the predictions from correlations to within 30%. Based on this, a Micropump has been designed which is miniaturizable to a level where it can be integrated into the microchannels. The Micropump utilizes a vibrating diaphragm along with induction EHD for pumping. The vibrating diaphragm does not cause any net flow by itself but causes high local bulk fluid velocities which lead to an increase in the power drawn from the electrodes and an increase in efficiency of EHD, both of which lead to a higher flow rate. The performance of the pump is predicted using an experimentally validated numerical model. The numerical model solves the three-dimensional transient fluid flow and charge transport problem due to simultaneous actuation of EHD and the vibrating diaphragm. Numerical results for Micropumps integrated into trapezoidal microchannels are presented. The results indicate that the proposed Micropump design has significant potential for microelectronics cooling applications: It is easy and inexpensive to fabricate, needs no added space, and can achieve the high flow rates needed.
Vishal Singhal - One of the best experts on this subject based on the ideXlab platform.
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induction electrohydrodynamics Micropump for high heat flux cooling
Sensors and Actuators A-physical, 2007Co-Authors: Vishal Singhal, Suresh V GarimellaAbstract:Induction electrohydrodynamics (EHD) has been investigated as a possible means of pumping liquids through microchannel heat sinks for cooling microprocessors. A pump utilizing induction EHD has been microfabricated and tested. The experimental results matched the predictions from correlations to within 30%. Based on this, a Micropump has been designed which is miniaturizable to a level where it can be integrated into the microchannels. The Micropump utilizes a vibrating diaphragm along with induction EHD for pumping. The vibrating diaphragm does not cause any net flow by itself but causes high local bulk fluid velocities which lead to an increase in the power drawn from the electrodes and an increase in efficiency of EHD, both of which lead to a higher flow rate. The performance of the pump is predicted using an experimentally validated numerical model. The numerical model solves the three-dimensional transient fluid flow and charge transport problem due to simultaneous actuation of EHD and the vibrating diaphragm. Numerical results for Micropumps integrated into trapezoidal microchannels are presented. The results indicate that the proposed Micropump design has significant potential for microelectronics cooling applications: It is easy and inexpensive to fabricate, needs no added space, and can achieve the high flow rates needed.
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induction electrohydrodynamics Micropump for high heat flux cooling
Sensors and Actuators A-physical, 2007Co-Authors: Vishal Singhal, Suresh V GarimellaAbstract:Induction electrohydrodynamics (EHD) has been investigated as a possible means of pumping liquids through microchannel heat sinks for cooling microprocessors. A pump utilizing induction EHD has been microfabricated and tested. The experimental results matched the predictions from correlations to within 30%. Based on this, a Micropump has been designed which is miniaturizable to a level where it can be integrated into the microchannels. The Micropump utilizes a vibrating diaphragm along with induction EHD for pumping. The vibrating diaphragm does not cause any net flow by itself but causes high local bulk fluid velocities which lead to an increase in the power drawn from the electrodes and an increase in efficiency of EHD, both of which lead to a higher flow rate. The performance of the pump is predicted using an experimentally validated numerical model. The numerical model solves the three-dimensional transient fluid flow and charge transport problem due to simultaneous actuation of EHD and the vibrating diaphragm. Numerical results for Micropumps integrated into trapezoidal microchannels are presented. The results indicate that the proposed Micropump design has significant potential for microelectronics cooling applications: It is easy and inexpensive to fabricate, needs no added space, and can achieve the high flow rates needed.
Adisorn Tuantranont - One of the best experts on this subject based on the ideXlab platform.
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mems based Micropumps in drug delivery and biomedical applications
Sensors and Actuators B-chemical, 2008Co-Authors: Asim Nisar, Nitin Afzulpurkar, Banchong Mahaisavariya, Adisorn TuantranontAbstract:This paper briefly overviews progress on the development of MEMS-based Micropumps and their applications in drug delivery and other biomedical applications such as micrototal analysis systems (μTAS) or lab-on-a-chip and point of care testing systems (POCT). The focus of the review is to present key features of Micropumps such as actuation methods, working principles, construction, fabrication methods, performance parameters and their medical applications. Micropumps have been categorized as mechanical or non-mechanical based on the method by which actuation energy is obtained to drive fluid flow. The survey attempts to provide a comprehensive reference for researchers working on design and development of MEMS-based Micropumps and a source for those outside the field who wish to select the best available Micropump for a specific drug delivery or biomedical application. Micropumps for transdermal insulin delivery, artificial sphincter prosthesis, antithrombogenic Micropumps for blood transportation, Micropump for injection of glucose for diabetes patients and administration of neurotransmitters to neurons and Micropumps for chemical and biological sensing have been reported. Various performance parameters such as flow rate, pressure generated and size of the Micropump have been compared to facilitate selection of appropriate Micropump for a particular application. Electrowetting, electrochemical and ion conductive polymer film (ICPF) actuator Micropumps appear to be the most promising ones which provide adequate flow rates at very low applied voltage. Electroosmotic Micropumps consume high voltages but exhibit high pressures and are intended for applications where compactness in terms of small size is required along with high-pressure generation. Bimetallic and electrostatic Micropumps are smaller in size but exhibit high self-pumping frequency and further research on their design could improve their performance. Micropumps based on piezoelectric actuation require relatively high-applied voltage but exhibit high flow rates and have grown to be the dominant type of Micropumps in drug delivery systems and other biomedical applications. Although a lot of progress has been made in Micropump research and performance of Micropumps has been continuously increasing, there is still a need to incorporate various categories of Micropumps in practical drug delivery and biomedical devices and this will continue to provide a substantial stimulus for Micropump research and development in future.
Asim Nisar - One of the best experts on this subject based on the ideXlab platform.
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mems based Micropumps in drug delivery and biomedical applications
Sensors and Actuators B-chemical, 2008Co-Authors: Asim Nisar, Nitin Afzulpurkar, Banchong Mahaisavariya, Adisorn TuantranontAbstract:This paper briefly overviews progress on the development of MEMS-based Micropumps and their applications in drug delivery and other biomedical applications such as micrototal analysis systems (μTAS) or lab-on-a-chip and point of care testing systems (POCT). The focus of the review is to present key features of Micropumps such as actuation methods, working principles, construction, fabrication methods, performance parameters and their medical applications. Micropumps have been categorized as mechanical or non-mechanical based on the method by which actuation energy is obtained to drive fluid flow. The survey attempts to provide a comprehensive reference for researchers working on design and development of MEMS-based Micropumps and a source for those outside the field who wish to select the best available Micropump for a specific drug delivery or biomedical application. Micropumps for transdermal insulin delivery, artificial sphincter prosthesis, antithrombogenic Micropumps for blood transportation, Micropump for injection of glucose for diabetes patients and administration of neurotransmitters to neurons and Micropumps for chemical and biological sensing have been reported. Various performance parameters such as flow rate, pressure generated and size of the Micropump have been compared to facilitate selection of appropriate Micropump for a particular application. Electrowetting, electrochemical and ion conductive polymer film (ICPF) actuator Micropumps appear to be the most promising ones which provide adequate flow rates at very low applied voltage. Electroosmotic Micropumps consume high voltages but exhibit high pressures and are intended for applications where compactness in terms of small size is required along with high-pressure generation. Bimetallic and electrostatic Micropumps are smaller in size but exhibit high self-pumping frequency and further research on their design could improve their performance. Micropumps based on piezoelectric actuation require relatively high-applied voltage but exhibit high flow rates and have grown to be the dominant type of Micropumps in drug delivery systems and other biomedical applications. Although a lot of progress has been made in Micropump research and performance of Micropumps has been continuously increasing, there is still a need to incorporate various categories of Micropumps in practical drug delivery and biomedical devices and this will continue to provide a substantial stimulus for Micropump research and development in future.
Majid Nabavi - One of the best experts on this subject based on the ideXlab platform.
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Steady and unsteady flow analysis in microdiffusers and Micropumps: a critical review
Microfluidics and Nanofluidics, 2009Co-Authors: Majid NabaviAbstract:In recent research, there has been a growing interest in the analysis of flow through microdiffusers and Micropumps in order to characterize and optimize the performance of these devices. In this review, the recent advances in the numerical and experimental analysis of the steady and pulsating flows through microdiffusers and valveless Micropumps are surveyed. The differences between the performance of microdiffusers and Micropumps in steady and unsteady flow regimes are described. Qualitative and quantitative discussions of the effects of different design parameters on the performance of microdiffusers and valveless Micropumps in both steady and unsteady flow regimes along with the contradictory results reported in the literature in this regard are provided. In addition, a summary of the latest Micropump technologies along with the advantages and disadvantages of each mechanism with the emphasis on the innovative and less-reviewed Micropumps are presented. Two important types of fixed microvalves, as part of valveless Micropumps are described in details. Experimental flow visualization of steady and pulsating flows through microdiffusers and Micropumps as a useful tool for better understanding the underlying micro-fluid dynamics is discussed. The present review reveals that there are many possible areas of research in the field of steady and unsteady flows through microdiffusers and Micropumps in order to understand the effects of all important design parameters on the performance of these devices.