csdl_dafoam connects CSDL to the adjoint-based CFD solver DAFoam for aerodynamic shape optimization. It wraps the flow solve and its adjoint derivatives as CSDL operations, so geometry from lsdo_geo, mesh deformation from IDWarp-JAX and optimizers from modOpt combine in one differentiable model. The bundled 2D airfoil example reduces drag by 36% over 100 iterations, with adjoint gradients validated against finite differences.
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