Development of an efficient immersed-boundary method with subgrid-scale models for conjugate heat transfer analysis using large eddy simulation

•Immersed-boundary based LES method developed for conjugate heat transfer problems.•An optimized flood-fill algorithm enhances thermal interpolation performance.•LES successfully predicted the turbulent flow and thermal characteristics.•Fluid-solid interaction significantly affects thermal character...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2019-05, Vol.134, p.198-208
Main Authors: Lee, Sangjoon, Hwang, Wontae
Format: Article
Language:English
Subjects:
Algorithms
Boundary conditions
Channel flow
Circular cylinders
Computational fluid dynamics
Computational grids
Computer simulation
Conjugate heat transfer analysis
Conjugates
Cross flow
Fluid flow
Heat flux
Heat transfer
Immersed boundary method
Induction heating
Interpolation
Large eddy simulation
Mathematical models
Scale models
Simulation
Solid-fluid interface interpolation
Subgrid-scale model
Thermodynamic properties
Turbulent flow
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Summary:•Immersed-boundary based LES method developed for conjugate heat transfer problems.•An optimized flood-fill algorithm enhances thermal interpolation performance.•LES successfully predicted the turbulent flow and thermal characteristics.•Fluid-solid interaction significantly affects thermal characteristics of the flow. A numerical procedure for conjugate heat transfer (CHT) analysis based on an immersed boundary (IB) method for large eddy simulation (LES) has been developed. The dynamic subgrid-scale (SGS) stress and heat flux models are implemented in the solver. Since discrepancy between the computational grid and solid-fluid interface generally exists, interpolation of thermal properties at the interface is necessary for the current method. Accordingly, an efficient interpolation scheme using the modified flood-fill algorithm is applied. In order to validate the capability of the developed method, three different CHT cases with turbulent flow were examined: channel flow between heated slabs, thermally-driven flow in a closed cavity, and crossflow around a heated circular cylinder. Compared to cases that just utilized an isothermal or constant-heat-flux boundary condition, when the CHT method was properly implemented, results more closely matched experimental data and existing correlations.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2019.01.019