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Update velocity also on dirichlet dofs #229

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Merged
miguelmaso merged 2 commits into from
Sep 1, 2026
Merged

Update velocity also on dirichlet dofs #229

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267b1f8
Update velocity also on dirichlet dofs
miguelmaso Aug 28, 2026
d564bfe
minor
miguelmaso Aug 28, 2026
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15 changes: 11 additions & 4 deletions src/ComputationalModels/Drivers.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -283,6 +283,13 @@ get_spaces(m::DynamicNonlinearModel) = m.spaces
get_assemblers(m::DynamicNonlinearModel) = (m.caches[4])


function midpoint_update!(v, x⁺, x⁻, Δt)
v .*= -1.0
v .-= (2.0 / Δt) * x⁻
v .+= (2.0 / Δt) * x⁺
end


"""
update_velocity!

Expand All @@ -291,10 +298,9 @@ and the previous displacement `xh⁻` using a midpoint time-stepping scheme.
The velocity is updated in place.
"""
function update_velocity!(vh, xh⁺, xh⁻, Δt)
v = get_free_dof_values(vh)
v .*= -1.0
v .-= (2.0 / Δt) * get_free_dof_values(xh⁻)
v .+= (2.0 / Δt) * get_free_dof_values(xh⁺)
# TODO: Once moved to Gridap 0.20, a dispatch get_dirichlet_dof_values(::CellField) will be available
midpoint_update!(get_free_dof_values(vh), get_free_dof_values(xh⁺), get_free_dof_values(xh⁻), Δt)
midpoint_update!(get_dirichlet_dof_values(get_fe_space(vh)), get_dirichlet_dof_values(get_fe_space(xh⁺)), get_dirichlet_dof_values(get_fe_space(xh⁻)), Δt)
return vh
end

Expand All @@ -307,6 +313,7 @@ The update is performed in place, modifying `xh⁻` to match both the free dof v
and the dirichlet dof values of `xh⁺`.
"""
function update_displacements!(xh⁻, xh⁺)
# TODO: Once moved to Gridap 0.20, a dispatch get_dirichlet_dof_values(::CellField) will be available
x = get_free_dof_values(xh⁻)
x .= get_free_dof_values(xh⁺)
x_dir = get_dirichlet_dof_values(get_fe_space(xh⁻))
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