Direct Numerical Simulation of Liquid Flow in a Horizontal Microchannel

Date

2005-07-21

Author

Tarı, İlker

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Numerical Simulations of liquid flow in a micro-channel between two horizontal plates are performed. The channel is infinite in streamwise and spanwise directions and its height is taken as 3.1 x 10(-4) m which falls within the dimension ranges of micro-channels. The Navier-Stokes equations with the addition of Brinkman number (Br) to the energy equation are used as the governing equations and a spectral methods based approach is applied to obtain the required accuracy to handle liquid flow in the micro-channel. It is known for micro-channels that Br combines the effects of conduction and viscous dissipation in liquids and is also a way of comparing the importance of later relative to former. A laminar flow of a liquid in a micro-channel shows different characteristics compared to a similar flow in a macro-channel. To observe the differences, three different cases are run over each of a range of Reynolds numbers: one with no axial conduction assumption that correspond to a case similar to macro-channel flow, another case with axial conduction included in the energy equation to simulate one of the main differences and lastly a case with inclusion of Br number in the governing equations. The results are compared with each other to see the effects of axial conduction and Br inclusion. A qualitative comparison is made with the previous results in literature.

Subject Keywords

Micro-channel flow, Brinkmann number, Horizontal channel heated from below, DNS

URI

https://hdl.handle.net/11511/41174

DOI

https://doi.org/10.1115/ht2005-72824

Collections

Department of Mechanical Engineering, Conference / Seminar

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Citation Formats

İ. Tarı, “Direct Numerical Simulation of Liquid Flow in a Horizontal Microchannel,” 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41174.