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NASA's DPLR Named Software of the Year

The Data Parallel Line Relaxation (DPLR) CFD code was named co-winner of NASA's Software of the Year award for 2007. Congratulations to team members Michael J. Wright, James Brown, David Hash, Matt Maclean, Ryan McDaniel, David Saunders, Chun Tang, and Kerry Trumble.

NASA engineers view a mesh generated for DPLR in this scene from their YouTube video. +

The DPLR software package is a suite of CFD tools for the computation of supersonic and hypersonic flows in chemical and thermal nonequilibrium. Included in the package are 2D/axisymmetric and 3D structured grid finite volume Navier-Stokes codes, a pre-processor, and a post-processor. The CFD solver is written in Fortran 90 and supports distributed memory parallelism through MPI. The code supports implicit boundary conditions, generalized multi-block topologies, and generalized chemical kinetics and thermodyamic property databases. Physical modeling is sufficient to solve perfect gas, dissociating, and weakly ionized flows in various states of nonequilibrium. Testing indicates that the code is very robust and exhibits a high parallel efficiency and scalability, and demonstrates order of magnitude improvements in solution time over the previous state of the art.

DPLR was used at NASA Ames Research Center and NASA Johnson Space Center (JSC) to define re-entry aerothermal heating environments for the Shuttle Orbiter in support of the STS-107 accident analysis, the RTF Program, and STS-114 in-flght damage assessment. DPLR, in conjunction with rapid grid generation tools, enabled same-day turnaround analysis of the potential entry risk of observed on-orbit tile damage, including the protruding gap filler and torn blanket.

This grid for DPLR is from their YouTube video. +

NASA's Software of the Year award recognizes developers of exceptional software created for or by NASA. The competition recognizes the NASA team members that set high standards for significant software that is creative, usable, transferable, and possesses inherent quality.

Watch this YouTube video or listen to this podcast to learn more about DPLR. At about 4:00 into the video, you'll see Gridgen at work.

This article was compiled from NASA and NASA Tech Briefs sources. DPLR is a NASA product.