A New Diffusing-Vortex Numerical Scheme
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{'SignBlockName': 'Ritchie B. Coryell', 'PO_EMAI': None, 'PO_PHON': None}
A diffusing-vortex method, for solving the two-dimensional                 incompressibl Navier-Stokes equation, will be extended and                      applied to the external incompressible viscous flow over a                      generally smooth blunt body.  The numerical advantages over other               Langrangian vortex methods will be further demonstrated by                      reducing total CPU time and by avoiding cut-off procedures.  The                new approach, which is an approximate expression of the Green's                 function of the diffusion equation, will be constructed for a                   general two-dimensional smooth contour at a high Reynolds number.               A benchmark case, the cylinder problem will be used to examine                  the accuracy of the code and the effect of spatial mesh length                  and time step length on computational results.                                       The proposed finite difference analysis based on the                       diffusing vortex method can be applied to the unsteady                          imcompressible viscous flow past two dimensional geometry                       typical of circular, elliptic, and other type of cylinders with                 CPU time less than vortex method by one order of magnitude.
{'FirstName': 'Timothy', 'LastName': 'Ross', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Timothy J Ross', 'EmailAddress': 'ross@unm.edu', 'PI_PHON': '5052773459', 'NSF_ID': '000429435', 'StartDate': '02/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
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{'Code': '5371', 'Text': 'SBIR Phase I'}
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