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Gradient Transport Correction (GTC): A General Confinement Method for Better…

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Advanced Dynamics, Inc.
1500 Bull Lea Road, Suite 203 Lexington, KY 40511-
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Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
Phase 1
Fiscal Year: 2008
Title: Gradient Transport Correction (GTC): A General Confinement Method for Better Simulation of Rotor Wake and Vortex-Dominated Flows
Agency: NASA
Contract: NNX08CA58P
Award Amount: $99,837.00


CFD modeling and simulation has been heavily invested in decades of manpower by a large community of researchers. However, the excessive numerical diffusion inherently caused by discretization errors plus the possibly largest/finest grid requirement for rotor wake modeling prevents CFD to be routinely used in practical engineering calculations. The proposed Gradient Transport Correction (GTC) method provides an innovative artificial compression that can serves as a general confinement for greatly enhancing the resolution of rotor wake capturing while significantly reducing the grid requirement. In this proposal, we have demonstrated the great potential of GTC method to counteract the numerical dissipation and absolutely preserve the wake vortical structure with a small number of grid cells. Phase I will develop an initial capability, and the capability to be established in Phase I will be developed into a general engineering tool that has engineering analysis accuracy as well as transparent set-up for a broad range of important engineering calculations, such as computing hover performance, high-lift and separation flows, as well as various types of multiple rotors.

Principal Investigator:

Patrick Hu
Principal Investigator

Business Contact:

Patrick Hu
Business Official
Small Business Information at Submission:

Advanced Dynamics, Inc.
1500 Bull Lea Road, Suite 203 Lexington, KY 40511

EIN/Tax ID: 510617963
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No