Recent Improvements to the LAURA and HARA Codes

This paper describes recent improvements to the LAURA and HARA codes. LAURA is
a CFD code for aerothermodynamics, and HARA evaluates the shock-layer radiation that
provides the radiative source term for the flowfield energy equations and radiative heating
to a surface. The next release of LAURA and HARA includes a variety of new capabilities.
These new capabilities include an automated uncertainty quantification workflow for radiative
heat transfer, options for specifying surface roughness and turbulent transition location in
the algebraic turbulence models, and improved grid and solution interpolation techniques.
Additionally, the computational efficiency of both LAURA and HARA have been improved.
Optimization of the MPI communication routines in LAURA are shown to improve the parallel
efficiency of the primary flow when running with multiple processes per block, and recent
optimization of HARA leverage graphics processing unit (GPU) acceleration in the radiation
calculations. Using GPU acceleration of HARA is shown to decrease the cost of the radiation
line-of-sight calculation by approximately one order of magnitude for a 10.5 km/s Earth entry
simulation.