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Fast heat transfer calculations in supercritical fluids versus hydrodynamic approach

By Vadim Nikolayev, A Dejoan, Yves Garrabos and D Beysens


International audienceThis study investigates the heat transfer in a simple pure fluid whose temperature is slightly above its critical temperature. We propose a efficient numerical method to predict the heat transfer in such fluids when the gravity can be neglected. The method, based on a simplified thermodynamic approach, is compared with direct numerical simulations of the Navier-Stokes and energy equations performed for CO2 and SF6. A realistic equation of state is used to describe both fluids. The proposed method agrees with the full hydrodynamic solution and provides a huge gain in computation time. The connection between the purely thermodynamic and hydrodynamic descriptions is also discussed

Topics: [ PHYS.PHYS.PHYS-FLU-DYN ] Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], [ PHYS.MECA.MEFL ] Physics [physics]/Mechanics [physics]/Mechanics of the fluids [physics.class-ph], [ PHYS.MECA.THER ] Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph]
Publisher: American Physical Society
Year: 2003
DOI identifier: 10.1103/PhysRevE.67.061202
OAI identifier: oai:HAL:hal-01261616v1
Provided by: Hal-Diderot

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