Hi there, I’m running a simulation of a francis turbine in order to get pressure inlet, efficiency and power output.
The project is located at
I have created the flow volume and simulation according your francis turbine tutorial, and although it seems to be ok regarding to the geometry and rotating region, the inlet pressure and pressure moment z results are not converging.
Furthermore, I would ask you to please confirm that in my case I need to take only (pressure moment z * angular velocity) to output power calculation.
Thanks in advance,
Hi Flavio, I just checked your current run and it seems that there is no divergence issue any more, what did you change?
I have changed the geometry in order to make it round, smoth as possible, as well increased the inlet and outlet length.
Please take a look in the followings results of run 6, you will see that it is a bit better than before, but still not yet converging:
Average Area 1: p(Pa)
Forces and Moments 1: Pressure moment z
It is not actually bad, 1e-3 is a good starting point, and it seems to be slowly converging, why don’t you continue your run for more iterations?
In some analysis types, it is possible to continue to an existing simulation run. This feature is called "continue the run". Find out more.
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Hi, unfortunately didn’t work…
If you have any idea, please let me know
Hi Flavio, quick question, in your previous studies, did you set the Cell zone for the MRF region before the mesh generation?
\Check the Standard mesher section here:
Rotating zones can be used in CFD simulations to model rotating systems, such as turbines, fans, and ventilators. Learn more about their setup here!
Est. reading time: 3 minutes
Let me know, and we can make changes according to your answer
Hi Fillia, in fact I didn’t do this.