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Proceedings of CHT-17 ICHMT International Symposium on Advances in Computational Heat Transfer
May 28 - June 1, 2017, Napoli, Italy

DOI: 10.1615/ICHMT.2017.CHT-7


ISBN Print: 9781-56700-4618

ISSN: 2578-5486

THERMALLY INDUCED FLOW BETWEEN TWO MICRO-ECCENTRIC CYLINDERS

pages 1255-1266
DOI: 10.1615/ICHMT.2017.CHT-7.1340
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摘要

Macroscopic equations have been used to study the thermally induced flow between two micro-eccentric cylinders in the slip and early transition regime. In comparison with the kinetic data, the computed results from the regularised 26 moment equations are validated up to the Knudsen number equal to 0.4 in terms of the force acting on the inner cylinder and the thermal energy transmitted between the two cylinders. The contributions to the resultant force from the pressure, normal and shear stress are analysed. The Navier-Stokes-Fourier equations with the velocity slip and temperature jump boundary conditions cannot predict the force direction correctly even in the slip regime. The collision models have a significant impact on the thermally induced problems, particularly the value of the Prandtl number.

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