Investigation of fluid flow and heat transfer in rotating microchannels is important for centrifugal microfluidics, which has emerged as an advanced technique in biomedical applications and chemical separations. The pseudo forces namely the centrifugal force and the Coriolis force arising as a consequence of the rotating reference frame change the flow pattern significantly from the parabolic profile in a non-rotating channel. The convective heat transfer process is also influenced by the secondary flow introduced by the rotational effect. Moreover, if the microchannel wall is hydrophobic, slip flow can occur inside the channel when the conventional no slip boundary condition is no longer valid. In this work, we have numerically investigated the flow and heat transfer inside a straight rotating rectangular microchannel in the slip flow regime. A pressure based finite volume technique in a staggered grid was applied to solve the steady incompressible Navier-Stokes and energy equations. It has been observed that, depending on the rotational velocity, different slip velocities are induced at the channel walls. The average fluid temperature increases with the increase of rotation as convective heat transfer mechanism is increased due to the secondary flow. However, the slip boundary condition has a negligible effect on the temperature profiles.
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ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4478-6
PROCEEDINGS PAPER
Numerical Investigation of Slip Flow and Heat Transfer in Rotating Rectangular Microchannels Available to Purchase
Pratanu Roy,
Pratanu Roy
Texas A&M University, College Station, TX
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N. K. Anand,
N. K. Anand
Texas A&M University, College Station, TX
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Debjyoti Banerjee
Debjyoti Banerjee
Texas A&M University, College Station, TX
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Pratanu Roy
Texas A&M University, College Station, TX
N. K. Anand
Texas A&M University, College Station, TX
Debjyoti Banerjee
Texas A&M University, College Station, TX
Paper No:
HT2012-58507, pp. 1087-1094; 8 pages
Published Online:
July 24, 2013
Citation
Roy, P, Anand, NK, & Banerjee, D. "Numerical Investigation of Slip Flow and Heat Transfer in Rotating Rectangular Microchannels." Proceedings of the ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 1087-1094. ASME. https://doi.org/10.1115/HT2012-58507
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