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Programs to Map Boundary Conditions From Coarse Models to Detail Models

IP.com Disclosure Number: IPCOM000101819D
Original Publication Date: 1990-Sep-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Linton, RL: AUTHOR

Abstract

Disclosed is the structure for a set of FORTRAN programs which extract data from 3D simulation results and interpolate to points on a finer mesh. This function provides boundary conditions for a model on a sub-region of the original model.

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Programs to Map Boundary Conditions From Coarse Models to Detail Models

       Disclosed is the structure for a set of FORTRAN programs
which extract data from 3D simulation results and interpolate to
points on a finer mesh.  This function provides boundary conditions
for a model on a sub-region of the original model.

      Computer simulations of fluid flow and heat transfer problems
frequently must be solved in two steps.  First, a coarse model is
solved to predict the gross system characteristics.  Then, a detailed
model of a small region of interest is solved, using results from the
coarse model as boundary conditions.  Previous application of this
approach required manual interpolation and transfer of the coarse
results onto the detailed model.

      In order to eliminate this tedious and error-prone process, a
set of three FORTRAN programs was written to perform the
interpolation and transfer operation.  The first program reads a
sequential file of results from the coarse model and writes a
direct-access file of the data for later use.  The second program
reads a file of geometric data for the detailed model, shifts the
geometry to the proper coordinates within the coarse model, and
writes out a file of this modified geometry.  The third program reads
from the coarse data file and the detailed geometry file and writes
to a boundary conditions file.

      Boundary conditions are calculated for points which lie on the
six faces of a rectangula...