dc.contributor.author |
Cheikh, Mohamad Ibrahim, |
dc.date.accessioned |
2017-08-30T14:05:50Z |
dc.date.available |
2017-08-30T14:05:50Z |
dc.date.issued |
2015 |
dc.date.submitted |
2015 |
dc.identifier.other |
b18350641 |
dc.identifier.uri |
http://hdl.handle.net/10938/10628 |
dc.description |
Thesis. M.E. American University of Beirut. Department Mechanical Engineering, 2015. ET:6255 |
dc.description |
Advisor : Dr. Issam Lakkis, Associate Professor, Mechanical Engineering ; Members of Committee : Dr. Fadl Moukalled, Professor, Mechanical Engineering ; Dr. Mu'tasem Shehadeh, Assistant Professor, Mechanical Engineering. |
dc.description |
Includes bibliographical references (leaves 49-51) |
dc.description.abstract |
In this work, a microfluidic device for analog flow control is presented. The device consists of a microchannel with an elastic compliant wall where the fluid flow-rate is controlled by the combined effect of the pressure differential across the channel and the deflection of the elastic wall. A reduced-order model that captures the steady and lowfrequency unsteady behavior of the device is presented. The model is based on coupling the equations governing the membrane deflection and fluid flow while employing some assumptions to reduce their complexity. Numerical simulations ANSYS-Fluent are used for characterizing the device behavior in terms of dependence of the flow rate on the operating pressure differences; in a manner analogous to analogous to standard characterization of electronic transistors. In addition to the characteristic curves, the reduced order parameters (i.e. the fluidic transconductance, intrinsic output resistance, and gain) are generate dover wide ranges of operating pressures. Accuracy of the proposed reduced-order model is assessed by comparing with ANSYS fluid-structure interaction (FSI) simulation. Finally an applications of how the transistor can be used is presented in for two examples: (i) in a common source circuit configuration for small signal amplification, and (ii) as an analog flow controller for mixing of two pulsating flows. |
dc.format.extent |
1 online resource (xi, 51 leaves) : illustrations (some color) ; 30cm |
dc.language.iso |
eng |
dc.relation.ispartof |
Theses, Dissertations, and Projects |
dc.subject.classification |
ET:006255 |
dc.subject.lcsh |
Microfluidics. |
dc.subject.lcsh |
Electronic control. |
dc.subject.lcsh |
Fluid dynamics. |
dc.subject.lcsh |
Mixing -- Equipment and supplies. |
dc.subject.lcsh |
Computational fluid dynamics. |
dc.title |
A microfluidic transistor for analog micro-flows control - |
dc.type |
Thesis |
dc.contributor.department |
Faculty of Engineering and Architecture. |
dc.contributor.department |
Department of Mechanical Engineering, |
dc.contributor.institution |
American University of Beirut. |