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Fluent and Gambit Workshop

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khalid_nitt

A workshop on Fluent and Gambit conducted at NIT Trichy.

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FLUENT & GAMBIT ALCHEMY 2010 S G Sriram Ragav and N Khalid Ahmed Department of Chemical Engineering National Institute of Technology, Tiruchirrappalli – 620 015
WHAT IS CFD...?? ,[object Object],[object Object],[object Object]
WHERE IS CFD USED...?? ,[object Object],Aerospace F18 Store Separation Automotive Biomedical Temperature and natural convection currents in the eye following laser heating. Polymerization reactor vessel - prediction of flow separation and residence time effects. Chemical Processing Hydraulics HVAC Sports Power Generation Flow around cooling towers Flow of lubricating mud over drill bit Oil & Gas Streamlines for workstation ventilation
MODELLING ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Math Modeling and Simulation of Physical Processes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
GEOMETRY AND DOMAIN ,[object Object],[object Object],[object Object],[object Object]
GOVERNING EQUATIONS ,[object Object],[object Object]
Methods Of Solution: ,[object Object],[object Object],[object Object]
Finite Element Basics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Finite Volume Basics ,[object Object],[object Object],[object Object],[object Object],[object Object]
FVM Vs FEM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Types of Solution Strategies ,[object Object],[object Object]
Implicit Vs Explicit ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
FLOW CONDITIONS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
INITIAL AND BOUNDARY CONDITIONS ,[object Object],[object Object],[object Object],[object Object],[object Object]
BOUNDARY CONDITIONS No-slip walls: u=0,v=0 v=0, dp/dr=0,du/dr=0 Inlet ,u=c,v=0 Outlet, p=c o r x Axisymmetric
SOLVING THE GOVERNING EQUATIONS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
NUMERICAL METHODS – GRID GENERATION ,[object Object],[object Object],[object Object],[object Object],structured unstructured
CFD PROCESS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Viscous Model Boundary Conditions Initial Conditions Convergent Limit Contours Precisions (single/ double) ‏ Numerical Scheme Vectors Streamlines Verification Geometry Select Geometry Geometry Parameters Physics Mesh Solve Post-Processing Compressible ON/OFF Flow properties Unstructured (automatic/ manual) ‏ Steady/ Unsteady Forces Report (lift/drag, shear stress, etc) ‏ XY Plot Domain Shape and Size Heat Transfer ON/OFF Structured (automatic/ manual) ‏ Iterations/ Steps Validation Reports
FLUENT OVERVIEW
SOLVER EXECUTION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
INPUTS TO THE SOLVER ,[object Object],[object Object],[object Object],[object Object]
READING MESH – MESH COMPONENTS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Simple 2D mesh Simple 3D mesh face cell node edge node face cell cell center
SCALING MESH AND UNITS ,[object Object],[object Object],[object Object],[object Object]
MATERIAL TYPES AND PROPERTY DEFINITION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MATERIAL ASSIGNMENT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
POST PROCESSING ,[object Object],[object Object],[object Object],[object Object],[object Object]
POST PROCESSING – NODE VALUES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SOLVER ENHANCEMENTS – GRID ADAPTATION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ADAPTATION EXAMPLE – 2D PLANAR SHELL 2D planar shell - initial grid ,[object Object],2D planar shell - contours of pressure initial grid
ADAPTATION EXAMPLE – FINAL GRID & SOLUTION 2D planar shell - contours of pressure final grid 2D planar shell - final grid
DEFINING BOUNDARY CONDITIONS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
AVAILABLE BOUNDARY CONDITION TYPES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],inlet outlet wall interior Orifice_plate and orifice_plate-shadow
CHANGING BOUNDARY CONDITION TYPES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SETTING BOUNDARY CONDITION DATA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
VELOCITY INLET ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PRESSURE INLET ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Incompressible flows: Compressible flows:
PRESSURE INLET ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PRESSURE OUTLET ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
OUTFLOW ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
WALL BOUNDARIES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SYMMETRY AND AXIS BOUNDARIES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],symmetry planes
PERIODIC BOUNDARIES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Translationally periodic planes 2D tube heat exchanger flow Rotationally periodic planes
CELL ZONES - FLUID ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CELL ZONES - SOLID ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
GAMBIT OVERVIEW
What is GAMBIT ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Types of Grids in Gambit ,[object Object],[object Object]
Structured Grids ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Unstructured Grids ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Unstructured Grid Topologies
Gambit - bottom up approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
GUI Main Menu bar Global Control Operation toolpad Command line Description window
Operation Tool Pads ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Coordinate Systems Sizing Function G/Turbo User-Defined Tools
Graphical User Interface ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Global Control
Mouse Operations ,[object Object],[object Object],[object Object],[object Object],[object Object]
Thank You

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Fluent and Gambit Workshop

  • 1. FLUENT & GAMBIT ALCHEMY 2010 S G Sriram Ragav and N Khalid Ahmed Department of Chemical Engineering National Institute of Technology, Tiruchirrappalli – 620 015
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16. BOUNDARY CONDITIONS No-slip walls: u=0,v=0 v=0, dp/dr=0,du/dr=0 Inlet ,u=c,v=0 Outlet, p=c o r x Axisymmetric
  • 17.
  • 18.
  • 19.
  • 20. Viscous Model Boundary Conditions Initial Conditions Convergent Limit Contours Precisions (single/ double) ‏ Numerical Scheme Vectors Streamlines Verification Geometry Select Geometry Geometry Parameters Physics Mesh Solve Post-Processing Compressible ON/OFF Flow properties Unstructured (automatic/ manual) ‏ Steady/ Unsteady Forces Report (lift/drag, shear stress, etc) ‏ XY Plot Domain Shape and Size Heat Transfer ON/OFF Structured (automatic/ manual) ‏ Iterations/ Steps Validation Reports
  • 22.
  • 23.
  • 24.
  • 25.
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 31.
  • 32. ADAPTATION EXAMPLE – FINAL GRID & SOLUTION 2D planar shell - contours of pressure final grid 2D planar shell - final grid
  • 33.
  • 34.
  • 35.
  • 36.
  • 37.
  • 38.
  • 39.
  • 40.
  • 41.
  • 42.
  • 43.
  • 44.
  • 45.
  • 46.
  • 48.
  • 49.
  • 50.
  • 51.
  • 53.
  • 54. GUI Main Menu bar Global Control Operation toolpad Command line Description window
  • 55.
  • 56.
  • 58.

Notas do Editor

  1. We obviously cannot cover details of FE in general