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Towards Conjugate Heat Transfer in Complex Geometries With an Immersed Boundaries Cartesian Solver

[+] Author Affiliations
S. Moreau

Valeo Motors and Actuators, La Verrière, France

G. Iaccarino, G. Kalitzin

Stanford University, Stanford, CA

Paper No. HT-FED2004-56834, pp. 1299-1305; 7 pages
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 2, Parts A and B
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4691-1 | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME


The Cartesian incompressible RANS solver with Immersed Boundaries, IBRANS, recently developed at Stanford, has been extended to include conjugate heat transfer modeling and used for the simulation of the electrical motor of an automotive engine cooling fan system. Such applications are particularly challenging as they involve very complex geometries with tight tolerances and rotating parts. The new conjugate heat transfer capability of IBRANS has been validated on heated cylinder flows. Results are presented for a range of Reynolds numbers covering flow regimes ranging for a steady laminar flow to unsteady turbulent flows. Excellent agreement is achieved with similar simulations run with a “conventional” body fitted solver (Fluent) and equivalent turbulent models. Preliminary 3D simulations of the flow and heat transfer within the complete electrical motor are presented. The numerical predictions of the pressure drop through the motor as a function of flow rate agree very well with the measured data over the complete operating range.

Copyright © 2004 by ASME
Topics: Heat transfer



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