Topography optimisation using a reduced-dimensional model for transient conjugate heat transfer between fluid channels and solid plates with volumetric heat source - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year : 2023

Topography optimisation using a reduced-dimensional model for transient conjugate heat transfer between fluid channels and solid plates with volumetric heat source

Abstract

Consideration of transient effects is important for industrial applications of heat transfer structure optimisation studies, however, the huge computational cost associated with transient problems is a pressing concern. This paper proposes an extension of a previous reduced-dimensional model to transient conjugate heat transfer between a fluid flow and solid heated plates in a plate heat exchanger. The extended reduced-dimensional model introduces the temperature field of the plate governed by the heat conduction equation, which is coupled to the temperature field of the fluid, governed by the convection-diffusion equation, through the heat flux balance equation at the contact surface. The model is based on assumptions of fully-developed flow and constant temperature profile, reducing the three-dimensional problem to a planar problem and significantly reducing computational costs. The accuracy of the model for transient heat transfer simulation is verified by comparison with a three-dimensional model. In this paper, the topography of the heat exchanger plate is optimised for both steady-state and transient conditions by applying the reduced-dimensional model, resulting in topography-optimised designs with significantly improved performance compared to the reference design. The effectiveness of the optimised design was demonstrated by the cross-check of both the reduced-dimensional and full three-dimensional models. Compared to steady optimised design, transient optimised design demonstrates the impact of transient effects on optimisation results and the implications of considering transients are discussed.
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hal-04173258 , version 1 (28-07-2023)

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  • HAL Id : hal-04173258 , version 1

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Yupeng Sun, Song Yao, Joe Alexandersen. Topography optimisation using a reduced-dimensional model for transient conjugate heat transfer between fluid channels and solid plates with volumetric heat source. 2023. ⟨hal-04173258⟩

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