Application of Chimera/unstructured hybrid grids for conjugate heat transfer

Kao, Kai-Hsiung; Liou, Meng-Sing

doi:10.2514/3.13693

Cited by 2 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conjugate heat transfer has been applied to a great variety of problems using finite elements, finite volume methods, or both, generally in turbine blades (for example [6][7][8]). In a more recent work [9], results from a CHT simulation of a 3D film-cooled blade section were compared with those obtained from a standard temperature model, showing a significant difference in the level and distribution of metal temperatures between the two.…”

Section: Introductionmentioning

confidence: 99%

A quasi‐dynamic procedure for coupled thermal simulations

Errera

Baqué

2013

Numerical Methods in Fluids

View full text Add to dashboard Cite

SUMMARYThis paper outlines the development and adaptation of a coupling strategy for transient temperature analysis in a solid via a conjugate heat transfer method. This study proposes a quasi‐dynamic coupling procedure to bridge the temporal disparities between the fluid and the solid. In this approach, dynamic thermal modeling in the solid is coupled with a sequence of steady states in the fluid. This quasi‐dynamic algorithm has been applied to the problem of convective heat transfer over, and transient conduction heat transfer within, a flat plate using the severe thermal conditions of a solid propellant rocket. Two different coupled thermal computations have been performed. In the first one—referred to as the reference computation—the coupling period is equal to the smallest solid time constant. In the second one, a very large coupling period is used. The results show that the procedure can predict accurate transient temperature fields at a reasonable computational cost. The simulation CPU time is approximately reduced by up to 90%, while maintaining a very good accuracy. All the details of the numerical test case are given in the paper. This application illustrates the capabilities and the overall efficiency of this coupled approach in a solid transient problem using long term simulations of time dependent flows. Copyright © 2013 John Wiley & Sons, Ltd.

show abstract

Section: Introductionmentioning

confidence: 99%

A quasi‐dynamic procedure for coupled thermal simulations

Errera

Baqué

2013

Numerical Methods in Fluids

View full text Add to dashboard Cite

show abstract

“…2 A similar work was presented by Kao and Liou to compute the CHT problems using a hybrid over a set grid system. 3 Recently, Kazemi-Kamyab et al presented a strong-coupled solution algorithm where the high-order ESDIRK schemes were used to advance the solution in time within each separate fluid and solid subdomains. 4 Yan and Keyes proposed a Dirichlet velocity boundary control method to minimize the objective function that involves the sum of the mismatch between the temperature distribution in the fluid system and a prescribed temperature profile.…”

mentioning

confidence: 99%

An internal penalty discontinuous Galerkin method for simulating conjugate heat transfer in a closed cavity

Cai

Thornber

2018

Numerical Methods in Fluids

View full text Add to dashboard Cite

Summary Using the discontinuous Galerkin (DG) method for conjugate heat transfer problems can provide improved accuracy close to the fluid‐solid interface, localizing the data exchange process, which may further enhance the convergence and stability of the entire computation. This paper presents a framework for the simulation of conjugate heat transfer problems using DG methods on unstructured grids. Based on an existing DG solver for the incompressible Navier‐Stokes equation, the fluid advection‐diffusion equation, Boussinesq term, and solid heat equation are introduced using an explicit DG formulation. A Dirichlet‐Neumann partitioning strategy has been implemented to achieve the data exchange process via the numerical flux of interface quadrature points in the fluid‐solid interface. Formal h and p convergence studies employing the method of manufactured solutions demonstrate that the expected order of accuracy is achieved. The algorithm is then further validated against 3 existing benchmark cases, including a thermally driven cavity, conjugate thermally driven cavity, and a thermally driven cavity with conducting solid, at Rayleigh numbers from 1000 to 100 000. The computational effort is documented in detail demonstrating clearly that, for all cases, the highest‐order accurate algorithm has several magnitudes lower error than first‐ or second‐order schemes for a given computational effort.

show abstract

Application of Chimera/unstructured hybrid grids for conjugate heat transfer

Cited by 2 publications

References 4 publications

A quasi‐dynamic procedure for coupled thermal simulations

A quasi‐dynamic procedure for coupled thermal simulations

An internal penalty discontinuous Galerkin method for simulating conjugate heat transfer in a closed cavity

Contact Info

Product

Resources

About