Add mass-proportional Rayleigh damping for solid mechanics - #4
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Add mass-proportional Rayleigh damping for solid mechanics#4mohalinasre wants to merge 1 commit into
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Adds an optional damping_coeff (alpha, units 1/s) to the solid_mechanics block. When alpha > 0, the term alpha*rho*d(D)/dt is added to the solid momentum equation, discretized BDF1 (Euler implicit) to match solids4foam's fvm::ddt(D) and its dampingCoeff convention. Contributes alpha*rho*V_0/dt to the LHS diagonal and -alpha*rho*V_0/dt*(D - D_old) to the RHS residual. Default 0 reproduces the undamped solver exactly. Validated on the cavityFlexibleBottom case.
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Adds an optional damping_coeff (alpha, units 1/s) to the solid_mechanics block. When alpha > 0, the term alpharhod(D)/dt is added to the solid momentum equation, discretized BDF1 (Euler implicit) to match solids4foam's fvm::ddt(D) and its dampingCoeff convention. Contributes alpharhoV_0/dt to the LHS diagonal and -alpharhoV_0/dt*(D - D_old) to the RHS residual. Default 0 reproduces the undamped solver exactly.
Validated on the cavityFlexibleBottom case.
Usage: