An Automated High Aspect Ratio Mesher for Computational Fluid Dynamics

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$100,000.00
Award Year:
2010
Program:
STTR
Phase:
Phase I
Contract:
NNX10CF76P
Agency Tracking Number:
090014
Solicitation Year:
2009
Solicitation Topic Code:
T8.01
Solicitation Number:
n/a
Small Business Information
Ciespace Corporation
319 Olde Chapel Trail, Pittsburgh, PA, 15238-1255
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
023922709
Principal Investigator:
Kenji Shimada
Principal Investigator
() -
shimada@cmu.edu
Business Contact:
Rodney Phelps
Business Official
(412) 621-1400
phelps@ciespace.com
Research Institution:
Carnegie Mellon University
Not Available
5000 Forbes Avenue
Pittsburgh, PA, 15213
(412) 268-3614
Domestic nonprofit research organization
Abstract
Computational fluid dynamics (CFD) simulations are routinely used while designing, analyzing, and optimizing air- and spacecraft. An important component of CFD simulations is mesh generation, or discretization into polygonal or polyhedral cells, of the domain being analyzed. The overall computational cost and accuracy of simulations depend heavily on mesh quality – the size, shape, and structure of the cells. Another important aspect of CFD simulation is that solutions are achieved iteratively, with each subsequent pass decreasing error and increasing solution accuracy. Grid adaption uses output from the last simulation to improve the mesh for the next. FUN3D is a CFD simulator developed at NASA that requires both a tight integration with mesh generation software for grid adaption and the generation of high aspect ratio cells (i.e. 10,000:1) to accurately capture dynamics around boundary layers. Current meshing methods use the well known advancing front or Delaunay algorithms, and the user must often perform multiple manual inputs and interactions to generate a mesh of sufficient quality. Ideally, a meshing module would subdivide complex designs and perform grid adaption automatically, with little or no human intervention. The proposed innovation is the development of a very high aspect ratio mesher that demonstrates a significant improvement over current techniques as measured by the time and effort necessary for FUN3D users to solve CFD problems.

* information listed above is at the time of submission.

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