Numerical simulation of flow and heat transfer in radially rotating microchannels View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2013-09

AUTHORS

Pratanu Roy, N. K. Anand, Debjyoti Banerjee

ABSTRACT

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 centrifugal force and Coriolis force, arising as a consequence of the microchannel rotation, change the flow pattern significantly from the symmetric profile of a non-rotating channel. Successful design of microfluidic devices in centrifugal microfluidics depends on effectively regulating these forces in rotating microchannels. In this work, we have numerically investigated the flow and heat transfer in rotating rectangular microchannel with continuum assumption. A pressure-based finite-volume technique with a staggered grid was applied to solve the steady incompressible Navier–Stokes and energy equations. It was observed that the effect of Coriolis force was determined by the value of the non-dimensional rotational Reynolds number (Reω). By comparing the root mean square deviation of the axial velocity profiles with the approximate analytical results of purely centrifugal flow for different aspect ratios (AR = width/height), a critical rotational Reynolds number (Reω,cr) was computed. Above this value of (Reω,cr), the effect of secondary flow becomes dominant. For aspect ratios of 0.25, 0.5, 1.0, 2.0, 4.0 and 9.09, this critical rotational Reynolds number (Reω,cr) was found to be 14.0, 5.5, 3.8, 4.7, 6.5 and 10.0, respectively. More... »

PAGES

397-413

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10404-013-1159-z

DOI

http://dx.doi.org/10.1007/s10404-013-1159-z

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1015654479


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