Publications of Cheng, Zheming

• Interactive Topology Generation and Grid Viewer for GridPro / az3000

  Cheng Z., Eiseman P.R.

  Published in 1996

  A powerful interactive graphical manager has been established for GridPro® / az3000, the multiblock grid generation system which is fully automatic once a grid topology is given. While the generation of grid topology represents a substantially smaller task, the next question is how fast and easily can that task be accomplished. The answer given here comes with the use of interactive graphics. The subject of this paper is even more inclusive since the integrated use of graphics is employed to manage the entire grid generation process.

  Download PDF

• Examples of Grid Generation with Implicitly Specified Surfaces Using GridPro TM / az3000: Filleted Multi Tube Configurations

  Cheng Z., Eiseman P.R.

  Published in 1994

  With examples, we illustrate how implicitly specified surfaces can be used for grid generation with GridPro/az3000. The particular examples address two questions: (1) How do you model intersecting tubes with fillets? and (2) How do you generate grids inside the intersected tubes? The implication is much more general. With the results in a forthcoming paper which develops an easy-to-follow procedure for implicit surface modeling, we provide a powerful means for rapid prototyping in grid generation.

  Download PDF

• Applications of Multiblock Grid Generations with Automatic Zoning

  Eiseman P.R., Cheng Z., Hauser J.

  Published in 1994

  This paper is centered on the applications of a new grid generation package entitled GridPro^TM / az3000. The effects of grid topology on various problems are shown. These have ranged from cases with only a few blocks to cases with thousands of blocks. More than five distinct CFD codes have been successfully run on the generated grids. The grids are smooth and nearly orthogonal.

  Download PDF

• Applications of Multiblock Grid Generations with Automatic Zoning

  Eiseman P.R., Cheng Z., Hauser J.

  Published in 1994

  This paper is centered on the applications of a new grid generation package entitled GridPro^TM / az3000. The effects of grid topology on various problems are shown. These have ranged from cases with only a few blocks to cases with thousands of blocks. More than five distinct CFD codes have been successfully run on the generated grids. The grids are smooth and nearly orthogonal.

  Download PDF

• Multi-block Structured Grid Approach for Solving Flows over Complex Aerodynamics Configurations

  Vatsa V.N., Sanetrik M.D., Parlette E.B., Eiseman P.R., Cheng Z.

  Published in 1994

  A finite-volume, central-difference code, developed for solving three-dimensional flows, is used to obtain viscous solutions for a high lift configuration of practical interest. A novel block-structured grid approach is employed to generate computational grids suitable for resolving high gradient regions without propagating the denser grids to the far-field. The number of mesh points required for such grids is considerably less than that with conventional block-structured grids, where high density grids propagate all the way to the far-field in order to maintain C₀ continuity (point-to-point match) across the block boundaries. Computational results are presented for a 3-element airfoil to demonstrate the feasibility of this approach for aerodynamic computations. The computed solutions compare well with experimental data and demonstrate the flexibility and flows over complex geometries.

  Download PDF