Week 1: Channel flow simulation using CONVERGE CFD

Challenge 1

Aim:-

Channel flow simulation using CONVERGE CFD

Objective:

need to run 3 simulations and compare the results between all the 3 simulations.

3 different base mesh sizes are,

• dx = 2e-4m, dy = 2e-4m, dz = 2e-4m
• dx = 1.5e-4m, dy = 1.5e-4m, dz = 1.5e-4m
• dx = 1.0e-4m, dy = 1.0e-4m, dz = 1.0e-4m

simulation setup:

open converge studio application create a box

name boundaries

click on normal dongle and click on transformation select a plane and click apply

diagnosis the set of any error rectify them

case set up

Case set up

mesh setup

once case set up is done validate the setup

if any error are present resolve the errors

save the setup and export the input files to the folder

now open cygwin in administrator mode

change the folder to the folder where all input files are saved

and run the command mpiexec.exe -n 2 converge.exe restricted </dev/null> logfile &

wait till simulation complete

open converge studio and in that move to post process mode

Convert the post process file to readble file to paraview

now open paraview

select the converted file and post process result

animation and simulation file are sbmitted in zip file

result

basic run

case 1

case 2

case 3

conclusion

from velocity profile it can be seen that velocity at wall is less then the velocity at middle of the duct

flow follows the parabolic form in duct

and flow happens from higher pressure to lower