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  • Open Access

Turbulent heat transfer enhancement by compliant walls

Morie Koseki and Marco Edoardo Rosti*

  • *Contact author: marco.rosti@oist.jp
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Phys. Rev. Fluids 11, 054301 – Published 6 May, 2026

DOI: https://doi.org/10.1103/bb9p-47jt

Abstract

This study investigates the effect of compliant walls on the turbulent heat transfer in channel flows over viscous-hyperelastic walls. We perform direct numerical simulations, fully resolving the mutual fluid-structure interactions between the turbulent flow and the compliant walls, varying the wall elasticity and the thermal diffusivity in a fully turbulent condition. We show that the compliant wall leads to an increase not only of the momentum transfer, but also of the heat transfer. Since the compliant wall can dynamically move, in the near-wall region heat flux is mostly transferred via turbulent convection rather than diffusion, as typically found with rigid walls. Thus, the heat flux can be controlled not only by varying the thermal diffusivity, but also by changing the transverse modulus of elasticity which governs the wall-normal velocity fluctuations and consequently the temperature ones. Finally, we show that the physical mechanism controlling these modifications is the sweep and ejection events.

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Phys. Rev. Fluids 11, 054301– Published 6 May, 2026
  • Received 4 December 2025
  • Accepted 30 March 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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