Stable and Optimal Interface Treatment for Partitioned Conjugate Heat Transfer Problems

Marc-Paul Errera (1) , Rocco Moretti (1) , Yohann Bachelier (1) , Tristan Soubrié (2)

1 DAAA, ONERA, Université Paris-Saclay (COmUE) [Châtillon]
2 Andheo

In conjugate heat transfer (CHT) analysis, the fluid-solid heat transfer calculation is realized by expanding the fluid capability to include heat conduction in solid regions neighboring the fluid. Stability conditions of CHT analysis can be provided by a simplified model problem and from this model, two fundamental parameters are introduced in the coupled approach: a "numerical" Biot number, and an optimal coefficient. The first parameter defines the nature of the fluid-solid interaction. The optimal coefficient ensures unconditional stability. Results presented in this paper consider a wide range of steady thermal phenomena from weak to very strong fluid-solid interaction (insulating materials). At the end of the paper, an example of transient CHT is also shown. The methods proposed in this paper illustrate that a model problem can provide effective and practical solutions directly applicable to complex conjugate heat transfer problems.

Mots clés: THERMOPHYSICS; FLUID STRUCTURE INTERACTION; FLUIDS; HEAT CONDUCTION

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]

Marc-Paul Errera, Rocco Moretti, Yohann Bachelier, Tristan Soubrié. Stable and Optimal Interface Treatment for Partitioned Conjugate Heat Transfer Problems. AIAA Scitech 2019 Forum, Jan 2019, SAN DIEGO, United States. ⟨10.2514/6.2019-1561⟩. ⟨hal-02908793⟩