Large Eddy Simulation of Flow and Heat Transfer Around Two Square Cylinders in a Tandem Arrangement

Duchaine, Florent; Boileau, Matthieu; Sommerer, Y.; Poinsot, Thiérry

doi:10.1115/1.4027908

Cited by 15 publications

(5 citation statements)

References 33 publications

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“…[11] and [12]) to LES (e.g. [13] and [14]). Recent efforts also include those on faster and more robust interface treatments (e.g.…”

Section: Introductionmentioning

confidence: 99%

On Large Eddy Simulation Based Conjugate Heat Transfer Procedure for Transient Natural Convection

Fadl

2017

Journal of Turbomachinery

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Natural convection is an important heat transfer mode for flexible operations of gas turbines and steam turbines. Its prediction presents considerable challenges. The strong interdependence between fluid and solid parts points to the need for coupled fluid–solid conjugate heat transfer (CHT) methods. The fundamental fluid–solid time scale disparity is further compounded by the long-time scales of practical turbine flexible operations. In addition, if a high-fidelity flow model (e.g., large eddy simulation (LES)) is adopted to resolve turbulence fluctuations, extra mesh dependency on solid domain mesh may arise. In this work, understanding of the extra solid mesh dependency in a directly coupled LES based CHT procedure is gained by an interface response analysis, leading to a simple and clear characterization of erroneously predicted unsteady interface temperatures and heat fluxes. A loosely coupled unsteady CHT procedure based on a multiscale methodology for solving problems with large time scale disparity is subsequently developed. A particular emphasis of this work is on efficient and accurate transient CHT solutions in conjunction with the turbulence eddy resolved modeling (LES) for natural convection. A two-scale flow decomposition associated with a corresponding time-step split is adopted. The resultant triple-timing formation of the flow equations can be solved efficiently for the fluid–solid coupled system with disparate time scales. The problem statement, analysis, and the solution methods will be presented with case studies to underline the issues of interest and to demonstrate the validity and effectiveness of the proposed methodology and implemented procedure.

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“…[11] and [12]) to LES (e.g. [13] and [14]). Recent efforts also include those on faster and more robust interface treatments (e.g.…”

Section: Introductionmentioning

confidence: 99%

On Large Eddy Simulation Based Conjugate Heat Transfer Procedure for Transient Natural Convection

Fadl

2017

Journal of Turbomachinery

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“…Couple a steady or time-averaged flow solution with a steady solid conduction solution (e.g. Sun et al [30], Errera and Baqué, [31], Duchaine et al [37], [38]). However, there is a wide range of self-excited unsteadiness encountered in many practical applications, e.g.…”

Section: Fig 4-5 Temperature Fluctuations Around the Fluid-solid Inte...mentioning

confidence: 99%

Conjugate heat transfer: Some fundamentals and recent progress

2023

Advances in Heat Transfer

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“…Correct y 3 near-wall scaling of the sub-grid scale viscosity is achieved with the WALE model without the need for dynamic formulations. WALE has been successfully used within conjugate heat transfer simulations of cooled turbine blades [13] , the flow and heat transfer of two cylinders in tandem [14] and ribroughened internal turbine blade cooling channels [15] . The subgrid scale viscosity is obtained from Eq.…”

Section: Governing Equations and Solvermentioning

confidence: 99%