Elmer Discussion Forum

A generalized wave equation can be solved in time domain with the module WaveSolver. The module CompressibleNS could be used to model nonlinear wave propagation under the ideal gas law in time domain, but as such it's likely to be inefficient due to employing the monolithic solution approach. Both t...

where the "2D-plane"-limitation can be found in (the theory of) this code? I think the implementation for 2D cases (dim=2) is restricted to plane strain, since the code doesn't make any attempt to retrieve the third normal strain component via constitutive relations when plane stress is m...

The devel version has now been updated to fix this.

Thanks for reporting,
Mika

The issue with giving the imaginary part of a point load should now be resolved in the devel branch of the code repository. For example, if there exists a component variable "U Im 2", then the command "U 2 Load Im = Real ..." should define the imaginary part of the corresponding ...

How about just setting "Permittivity = 0.0"? Then the total electromagnetic energy computed by the solver would be the magnetic energy.

-- Mika

As it seems that a drilling rotation formulation may have a relative merit when the middle-surface is not smooth and the normal strain in the thickness direction is not of a primary interest, I updated the shell solver (in the devel branch) today to enable drilling degrees of freedom. With the new v...

A variable (of type Variable_t) is associated with a permutation array showing whether this variable is active at a node and how the entries are mapped in the assembly. To see the number of DOFs which are active one may test
-- Mika

Another question, how to set the damping value of the harmonic analysis? I just updated the source codes of both shell solvers in order to enable mass-proportional damping. If the material section has the command Rayleigh Damping Alpha = Real ... the solver should now create a damping matrix D = al...

You are right. The facet shell solver wasn't updated to assemble the mass matrix when "Harmonic Mode" = True. This is now fixed in the devel repository. At the minimum FacetShellSolve.F90 has to be recompiled in order to try again.

-- Mika

The assembly of beam sections was added into the shell solver only, so the facet shell solver doesn't understand beam sections.

-- Mika