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09/06/2023
On a 1/2-equation model of turbulence
In 1-equation URANS models of turbulence the eddy viscosity is given by ...
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06/14/2022
Conditioning of linear systems arising from penalty methods
Penalizing incompressibility in the Stokes problem leads, under mild ass...
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12/13/2021
Unconditional stability in 3d of a sparse grad-div approximation of the Navier-Stokes equations
Inclusion of a term -γ∇∇· u, forcing ∇· u to be pointwise small, is an e...
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09/24/2021
Clipping over dissipation in turbulence models
Clipping refers to adding 1 line of code A=minA,B to force the variable ...
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08/20/2021
Refactorization of a variable step, unconditionally stable method of Dahlquist, Liniger and Nevanlinna
The one-leg, two-step time-stepping scheme proposed by Dahlquist, Linige...
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06/18/2021
On the Prandtl-Kolmogorov 1-equation model of turbulence
We prove an estimate of total (viscous plus modelled turbulent) energy d...
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01/23/2020
Analysis of the variable step method of Dahlquist, Liniger and Nevanlinna for fluid flow
The two-step time discretization proposed by Dahlquist, Liniger and Neva...
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07/23/2019
On URANS Congruity with Time Averaging: Analytical laws suggest improved models
The standard 1-equation model of turbulence was first derived by Prandt...
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07/18/2019