Notes from CFD meeting (6/28/12, 4:30-6:30 pm)

Following the FLUENT tutorial on SimCafe (Cornell):

Open workbench Set units (units menu at top of screen) Under toolbox, drag “Fluid Flow (FLUENT)” to the project schematic Right click on “Fluid Flow (FLUENT)”

o Geometry Choose geometry>properties>change to 2D using dropdown

(advanced geometry options) Double click on geometry>set units in popup window Modeling tab

Select plane to sketch on Click new sketch to start new sketch Use Sketch tab to draw shapes

o Modify dimensions by clicking on the boundaries of each dimension (so for vertical height definition, click on two horizontal lines)

o Set constraints first, then set values Concept menu (top of screen)>create surface from sketch Click generate (lightning bolt button) to finish creating surface

o Mesh Double click on Setup to launch FLUENT Check and display mesh>click mesh>click info or check General section on main screen>click asymmetric under solver Models (left side of screen)

Only the viscous-laminar option should be enabled Materials (left side of screen)

Fluid>create and edit (set fluid name, viscosity/density) Boundary conditions (left side of screen)

Select a boundary, edit, and enter velocities or constraints (wall, interior, etc)

Centerline type = axis Outlet type = pressure-outlet Inlet type = velocity Pipe wall type = wall

Solution (left side of screen) Scheme = SIMPLE Momentum>second order upwind Solution Initialization>initialization methods>standard

initialization> “compute from” drop down menu>inlet Monitors>residuals – Print, plot>edit>set x, y, continuity to

desired residual Run Calculation>number of iterations>100

o Use “Calculate” button to run calculation

Results Graphics and Animation>vectors>display> views>mirror

planes Plots>XY Plot To save plots: File>save picture Specific plots:

o Y axis function = direction vector, x axis function = velocity (1st box), axial velocity (2nd box)

o Y axis function = wall fluxes (1st box), skin friction coefficient (2nd box)

To duplicate a model, in Workbench right click on the model (“Fluid Flow (FLUENT)”) and pick “duplicate”

To archive to zip files, File>archive to zip (include imported geometry if any)