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AUTOMATIC STRUCTURED BLOCKING AND MESHING SYSTEM

IP.com Disclosure Number: IPCOM000250337D
Publication Date: 2017-Jun-29
Document File: 5 page(s) / 558K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method is provided for automated structured blocking and meshing of a modeled element prior to CFD processing.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 43% of the total text.

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AUTOMATIC STRUCTURED BLOCKING AND MESHING SYSTEM

ABSTRACT

[0001] A method is provided for automated structured blocking and meshing of a

modeled element prior to CFD processing.

BACKGROUND

[0002] Computational fluid dynamics ("CFD") employs numerical analysis to solve

problems in fluid flow. Commercially available CFD solver software operates using a

software representation (e.g. solid model) of a physical structure which is exposed to a

fluid flow.

[0003] As is well known in the art, meshing, that is, dividing the software model into

individual elements, is a necessary precursor to running a CFD solver to obtain

computational results.

[0004] It is desirable to be able to perform meshing for complicated shapes. One

example of a complicated shape is the cavity that forms part of the secondary flowpath of

a gas turbine engine. This type of shape is generally a body of revolution, but has

complex boundaries when viewed in two-dimensional section.

[0005] A mesh may be structured or unstructured. A structured mesh has

computational benefits but is more difficult to apply to complex shapes. Conversely, an

unstructured mesh is easier to apply to complex shapes, but is less computationally

efficient.

[0006] In the prior art, it is common to use automated software to perform

unstructured meshing, even for complicated shapes. However, it has been difficult in the

prior art to perform structured meshing in a reliable and efficient way.

[0007] Described herein is a method for performing blocking and structured meshing in

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an automated fashion.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The concept may be best understood by reference to the following description

taken in conjunction with the accompanying single drawing Figure, which is a schematic

block diagram illustrating the steps in a blocking and meshing method.

DETAILED DESCRIPTION OF THE CONCEPT

[0009] The single Figure illustrates in diagrammatic form a multi-step method for

automated blocking and structured meshing. In this method, the process is made more

efficient by importing a component model in the form of a Parasolid geometry file into a

commercially available CFD software product such as ANSYS ICEM, along with a script.

The purpose and function of the script is to cause the CFD product to sequentially execute

several native ICEM functions. A generic cavity geometry to be analyzed is shown, with the

understanding that this is a two-dimensional sectional representation of a three-dimensional

body of revolution. The detailed process involves the following steps:

[0010] (1) The cavity geometry, typically an enclosed outline in two-dimension, is

read and a bounding surface is automatically created in UGNX software.

[0011] (2) The bounding surface is then exported to 'parasolid' format.

[0012] (3) A generic ICEM script file is generated on the fly, with meshing settings

given by the user. This script containing various commands of ICEM, is fully

programmed to do automated structured blo...