Grid generation is often quoted as the most important and most time consuming part of CFD analysis. The quality of the grid plays a direct role on the quality of the analysis, regardless of the flow solver used. Additionally, the solver will be more robust and efficient when using a well constructed mesh. With this in mind, it is important for the CFD analyst to know and understand all of the various grid generation methods. Only by knowing all the methods can he or she select the right tool to solve the problem at hand.

This two days course is designed for those who want to know basics of grid generation methods and Mathematics behind grid generation algorithms. The two mainly used methods viz. structured and unstructured will be studied during the course. The pros and cons of all the algorithms will be discussed in detail. To make the concepts clearer, hands-on sessions will be organized using commercial grid generation tools ICEM-CFD and GAMBIT.

After the training you can answer the questions like:

• What is grid? Why is it needed for CFD simulation?

• Which types of grid generation methods are used in the industry?

• What is the mathematics behind different meshing algorithms?

• What is structured and unstructured grid generation?

• Which type of grid have I to use for the problem under study?

• What are the advantages and disadvantages of different grid generation methods?

• I am a pre-processing engineer and I have different software packages for meshing. Which software can I use for meshing?

• What is grid quality and how it affects the CFD solution?

• What is "Designing grid for CFD simulation"?

This is the course after which you can create good quality grid with minimum cell count.

Who can attend this course ?

This course is suitable for meshing/pre-processing engineers in general and ICEM-CFD and GAMBIT users in-particular. As the grid generation methods are common for most of the meshing tools, those who are not using ICEM-CFD and GAMBIT for meshing can also attend this training.

This course is suitable for:

• New recruits in the pre-processing/meshing department

• Users of pre-processing tools who want to know mathematics behind grid generation methods

• CFD engineers involved in meshing activities

Course Objectives

The primary goal of this course is to introduce different grid generation methods, grid generation algorithms and mathematics behind the  grid generation process. The course is oriented towards understanding pros and cons of different grid methodologies for being an effective user of commercial meshing tools.

Following will be the outcome of the course

• Thorough understanding of grid generation methods

• Understanding of mathematics behind grid generation algorithms

• Good working knowledge of structured and unstructured methods

• Good knowledge of ICEM-CFD and GAMBIT meshing process

Course Deliverables

• All lectures in printed format

• Access to the ICEM-CFD and GAMBIT manuals and tutorials

• Test cases/tutorials explicitly designed by considering your own requirements

• Continuous guidance and support after the training session for CFD project execution

Course Content

• Overview of CAD repair for meshing

• Structured grid generation

  • Linear and transfinite interpolations

  • Laplace grid generation

  • Poisson grid generation

  • Map and submap methods

  • Sweeping

  • Mono and multiblock concepts

  • O, C, H block topology

  • CGNS multiblock format and structure

• Unstructured grid generation

  	Basic theory of unstructured grid generation
  	Advancing front algorithm
  	Delaunay triangulation algorithm
  	Quadtree and Octree based methods
  	Surface mesh generation and mesh repair
  	Volume mesh and volume mesh improvements
  	Mesh smoothening techniques
  	Grid clustering and quality checks parameters

• Structured grid generation in ICEM-CFD

  • Concept of geometry and blocking topology

  • Block creation and splitting operations

  • Block entity mapping and association

  • Block manipulations and vertex movement

  • Structured and unstructured mesh output

• Unstructured grid generation in ICEM-CFD and GAMBIT

  	Concept of patch dependent and independent meshing in ICEM-CFD
  	Octree based grid generation in ICEM-CFD
  	Unstructured grid generation methods GAMBIT

• Discussion and certification

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