Free-Surface Modeling of Cryogenic Fluids Using a Higher-Order, Unstructured Grid Volume-of-Fluid (VOF) Method

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX11CH36P
Agency Tracking Number: 104895
Amount: $99,998.00
Phase: Phase I
Program: SBIR
Awards Year: 2011
Solicitation Year: 2010
Solicitation Topic Code: X2.01
Solicitation Number: N/A
Small Business Information
AL, Huntsville, AL, 35805-1944
DUNS: 185169620
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Sarma Rani
 Principal Investigator
 (256) 726-4850
 sxh@cfdrc.com
Business Contact
 Silvia Harvey
Title: Business Official
Phone: (256) 726-4858
Email: sxh@cfdrc.com
Research Institution
 Stub
Abstract
Accurate and efficient computational modeling of free-surface flows has numerous applications of current and future relevance to NASA. At present, NASA engineers use several commercial codes for modeling cryogenic fluids. However, the free surface modeling technologies in these codes need improvements for better solution accuracy, and most are not scalable for highly parallel simulations. In this SBIR project, CFDRC and Streamline Numerics will develop and implement, in Loci-STREAM, an innovative and improved VOF methodology with the following advanced features: (1) Ability to handle triangle and quadrilateral cell types in 2-D, and tetrahedron and hexahedron cell types in 3-D; (2) Spatially second-order surface reconstruction for these cell-types; (3) Hybrid implicit-explicit time integration scheme that both maintains a sharp interface and allows realistic time-steps for the overall flow solver; and (4) Highly efficient parallelization with scalability to 1000s of processors. To demonstrate feasibility in Phase I, a previously developed 2-D stand-alone VOF module will be coupled to Loci-STREAM and validated. In Phase II, 3-D VOF capability will be developed and integrated with Loci-STREAM. An innovative multi-timescale algorithm that affords significantly larger time steps than standard VOF will also be implemented. Final demonstration of the software will be performed for practical cases to be decided in discussions with NASA/MSFC personnel.

* Information listed above is at the time of submission. *

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