Visual grid quality assessment for 3D unstructured meshes
Robert Haimes, Stuart D. Connell, SABINEA. VERMEERSCH · 1993
Areas of poor mesh can have a detrimental effect on the overall solution. With a structured mesh code grid quality assessment is a relatively straightforward task. Mesh plots on various coordinate planes may be made and visually inspected. Regions of poor mesh quality can then be identified and corrected. With unstructured meshes no such coordinate planes exist. Traditionally, when assessing a 3D unstructured mesh, a histogram of a cell quality measure has been used to determine if the grid is suitable for a solver. Although this procedure can inform the investigator where a region of poor quality mesh exists, it can do little to aid in understanding why the mesh is bad or how to improve the mesh. What is required is a method of visualizing the mesh in these regions. This paper presents a method for displaying elements of a 3D mesh in an attempt to extract information about grid quality and topology. With this improved understanding, the input to the grid generator may be modified to p...