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-   -   Ideal Gas properties- Axial turbine-need help in linking temperature and pressure (http://www.cfd-online.com/Forums/fluent/119343-ideal-gas-properties-axial-turbine-need-help-linking-temperature-pressure.html)

Gowrav June 15, 2013 04:50

Ideal Gas properties- Axial turbine-need help in linking temperature and pressure
 
Dear Forum Members,
As a part of my masters project, i am simulating CFD flow simulation of microturine. I am using slidingmesh-unsteady/ MRF-steady models with realizable k-epsilon. Press in -Press out are my BCs with tot-tot Pr.Ratio 2.. I am able to get pressure plots over blades after convergence (material -air with polynomial prop wrt temp over range of 800k-1300k), bt temperature and its related properties are not varying with the flow. in other words compressiblity is nt gt linked..
So i changed material to gas with ideal gas density and kinetic theory related viscosity and specific heat.(A benchmark case of nozzle worked correctly with this change. ie. press change and temp change observed). Now am getting divergence error with amg solver. Problem still nt solved after changing relaxation factors..
Can anyone pls tell where its gone wrong and how to correct..
Thanks in advance
Gowrav


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