GLTRS--Glenn
TITLE AND SUBTITLE:
User Manual for Beta Version of TURBO-GRD: 2A Software System for Interactive Two-Dimensional Boundary/Field Grid Generation, Modification, and Refinement

AUTHOR(S):
Yung K. Choo, John W. Slater, Todd L. Henderson, Colin S. Bidwell, Donald C. Braun, and Joongkee Chung

REPORT DATE:
October 1998

FUNDING NUMBERS:
WU-548-20-23-00

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-11082

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, DC 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-1998-206631
ICOMP-98-02

SUPPLEMENTARY NOTES:
Yung K. Choo, John W. Slater, Colin S. Bidwell, and Donald C. Braun, NASA Lewis Research Center, Cleveland, Ohio 44135; and Todd L. Henderson, Raytheon Systems Company, Waco, Texas 76715-4580, and Joongkee Chung, Ohio Aerospace Institute, Cleveland, Ohio 44142. Responsible person, Yung K. Choo, organization code 5840, (216) 433-5868.

ABSTRACT:
TURBO-GRD is a software system for interactive two-dimensional boundary/field grid generation, modification, and refinement. Its features allow users to explicitly control grid quality locally and globally. The grid control can be achieved interactively by using control points that the user picks and moves on the workstation monitor or by direct stretching and refining. The techniques used in the code are the control point form of algebraic grid generation, a damped cubic spline for edge meshing, and parametric mapping between physical and computational domains. It also performs elliptic grid smoothing and free-form boundary control for boundary geometry manipulation. Internal block boundaries are constructed and shaped by using a Bézier curve. Because TURBO-GRD is a highly interactive code, users can read in an initial solution, display its solution contour in the background of the grid and control net, and exercise grid modification using the solution contour as a guide. This process can be called an interactive solution-adaptive grid generation.

SUBJECT TERMS:
Grid generation; Computational fluid dynamics; Computer software system

NUMBER OF PAGES:
67

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