Transient simulation of pelton turbine guide

Hbkfire · October 13, 2022, 19:11

Good afternoon with everyone. I am doing a scientific investigation for my university, and I was trying so hard but my transient simulation of pelton turbine does not run. Does anyone know any guide where I can see where I am doing wrong? or maybe someone can explain to me how to proceed with it?

Thanks for all

zacko · October 17, 2022, 05:02

It is best to provide more informations for us about your general setup, mesh and eventually error warnings of the solver when it crashes.

Also, have a look at the CFX Tutorials. The tutorial "Flow in an axial turbine stage" provides information for transient simulations. Have a look at it, too.

Hbkfire · October 19, 2022, 12:06

Hi, thanks and maybe, do you have some guide to obtain a fine mesh for my geometries?

Hbkfire · October 19, 2022, 12:07

Thanks and maybe, Do you have any tutorial or guidebook to obtain a fine mesh of my computational domain?

ghorrocks · October 19, 2022, 18:07

Read the CFX documentation on obtaining convergence, also the FAQs on the forum: https://www.cfd-online.com/Wiki/Ansys_FAQ

Note that a finer mesh usually is harder to converge, not easier. But a higher quality mesh will definitely help. How do you do a high quality mesh? Do the tutorials on your meshing software.

zacko · October 20, 2022, 05:54

You said that your transient simulations didn't run. Do they run now or even start ? If not, how about your steady-state simulations ? Any errors there ?

October 13, 2022, 19:11	Transient simulation of pelton turbine guide	#1
Hbkfire New Member Jhoao Join Date: Sep 2022 Posts: 3 Rep Power: 3	Good afternoon with everyone. I am doing a scientific investigation for my university, and I was trying so hard but my transient simulation of pelton turbine does not run. Does anyone know any guide where I can see where I am doing wrong? or maybe someone can explain to me how to proceed with it? Thanks for all

October 19, 2022, 18:07		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,729 Rep Power: 143	Read the CFX documentation on obtaining convergence, also the FAQs on the forum: https://www.cfd-online.com/Wiki/Ansys_FAQ Note that a finer mesh usually is harder to converge, not easier. But a higher quality mesh will definitely help. How do you do a high quality mesh? Do the tutorials on your meshing software. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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October 17, 2022, 05:02		#2
zacko Senior Member Daniel Join Date: Feb 2017 Location: Germany Posts: 159 Rep Power: 9	It is best to provide more informations for us about your general setup, mesh and eventually error warnings of the solver when it crashes. Also, have a look at the CFX Tutorials. The tutorial "Flow in an axial turbine stage" provides information for transient simulations. Have a look at it, too.

October 19, 2022, 12:06		#3
Hbkfire New Member Jhoao Join Date: Sep 2022 Posts: 3 Rep Power: 3	Hi, thanks and maybe, do you have some guide to obtain a fine mesh for my geometries?

October 19, 2022, 12:07		#4
Hbkfire New Member Jhoao Join Date: Sep 2022 Posts: 3 Rep Power: 3	Thanks and maybe, Do you have any tutorial or guidebook to obtain a fine mesh of my computational domain?

October 20, 2022, 05:54		#6
zacko Senior Member Daniel Join Date: Feb 2017 Location: Germany Posts: 159 Rep Power: 9	You said that your transient simulations didn't run. Do they run now or even start ? If not, how about your steady-state simulations ? Any errors there ?