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Evidence for the incompatibility of smoothed particle hydrodynamics and eddy viscosity models for large eddy simulations
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- Journal:
- Journal of Fluid Mechanics / Volume 1029 / 25 February 2026
- Published online by Cambridge University Press:
- 19 February 2026, A34
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In this work, we will present evidence for the incompatibility of smoothed particle hydrodynamics (SPH) methods and eddy viscosity models. Taking a coarse-graining perspective, we physically argue that SPH methods operate intrinsically as Lagrangian large eddy simulations for turbulent flows with strongly overlapping discretisation elements. However, these overlapping elements in combination with numerical errors cause a significant amount of implicit subfilter stresses (SFS). Considering a Taylor–Green flow at
$Re=10^4$, the SFS will be shown to be relevant where turbulent fluctuations are created, explaining why turbulent flows are challenging even for current SPH methods. Although one might hope to mitigate the implicit SFS using eddy viscosity models, we show a degradation of the turbulent transition process, which is rooted in the non-locality of these methods.
Speaking through the silence: Narratives, social conventions, and power in Java. By Laine Berman. (Oxford studies in anthropological linguistics 19.) New York & Oxford: Oxford University Press, 1998. Pp. xviii, 256.
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- Journal:
- Language / Volume 76 / Issue 4-Part1 / December 2000
- Published online by Cambridge University Press:
- 19 February 2026, pp. 948-949
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