Patents by Inventor Shahyar Z. Pirzadeh

Shahyar Z. Pirzadeh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Domain decomposition by the advancing-partition method for parallel unstructured grid generation
    Patent number: 8259104
    Abstract: In a method for domain decomposition for generating unstructured grids, a surface mesh is generated for a spatial domain. A location of a partition plane dividing the domain into two sections is determined. Triangular faces on the surface mesh that intersect the partition plane are identified. A partition grid of tetrahedral cells, dividing the domain into two sub-domains, is generated using a marching process in which a front comprises only faces of new cells which intersect the partition plane. The partition grid is generated until no active faces remain on the front. Triangular faces on each side of the partition plane are collected into two separate subsets. Each subset of triangular faces is renumbered locally and a local/global mapping is created for each sub-domain. A volume grid is generated for each sub-domain. The partition grid and volume grids are then merged using the local-global mapping.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: September 4, 2012
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Shahyar Z. Pirzadeh, Soheila Banihashemi, legal representative
  • Domain Decomposition By the Advancing-Partition Method for Parallel Unstructured Grid Generation
    Publication number: 20100134498
    Abstract: In a method for domain decomposition for generating unstructured grids, a surface mesh is generated for a spatial domain. A location of a partition plane dividing the domain into two sections is determined. Triangular faces on the surface mesh that intersect the partition plane are identified. A partition grid of tetrahedral cells, dividing the domain into two sub-domains, is generated using a marching process in which a front comprises only faces of new cells which intersect the partition plane. The partition grid is generated until no active faces remain on the front. Triangular faces on each side of the partition plane are collected into two separate subsets. Each subset of triangular faces is renumbered locally and a local/global mapping is created for each sub-domain. A volume grid is generated for each sub-domain. The partition grid and volume grids are then merged using the local-global mapping.
    Type: Application
    Filed: June 29, 2009
    Publication date: June 3, 2010
    Applicants: Space Administration
    Inventors: Shahyar Z. Pirzadeh, Soheila Banihashemi