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Cfx solver manager: How to set correct y-axis value of pressure in monitor graph.

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Old   April 2, 2014, 21:51
Default Cfx solver manager: How to set correct y-axis value of pressure in monitor graph.
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Faizan
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Hi all,

I set the total pressure monitor at inlet to monitor my solution during run in cfx solver manager.

I set 1.4MPa total pressure at inlet but the graph is showing 0MPa. I don't know how to fix y-axis of graph? Picture is attached.

I know its basic question but I am a beginner. It is very important for me. Please help if anyone know....

thanks

Last edited by Mfaizan; December 17, 2015 at 23:46.
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Old   April 2, 2014, 22:37
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Quote:
Originally Posted by Mfaizan View Post
Hi all,

I set the total pressure monitor at inlet to monitor my solution during run in cfx solver manager.

I set 1.4MPa total pressure at inlet but the graph is showing 0MPa. I don't know how to fix y-axis of graph? Picture is attached.

I know its basic question but I am a beginner. It is very important for me. Please help if anyone know....

thanks
Please show your inlet condition and expression for monitor.
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Old   April 2, 2014, 23:02
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Hi antanas,

- My initial condition at inlet set to total pressure 1.4MPa with total temp 550 deg Centigrade.

- Fluid model set to Total energy.(supersonic flow)

- Expression for pressure monitor at inlet

= areaAve(Total Pressure)@inlet

Please suggest.

Thanks
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Old   April 3, 2014, 00:58
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Quote:
Originally Posted by Mfaizan View Post
Hi antanas,

- My initial condition at inlet set to total pressure 1.4MPa with total temp 550 deg Centigrade.

- Fluid model set to Total energy.(supersonic flow)

- Expression for pressure monitor at inlet

= areaAve(Total Pressure)@inlet

Please suggest.

Thanks
OK. Please post screenshots of your domain basic settings tab, your inlet boundary details tab and your initialization or post CCL file.
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Old   April 3, 2014, 01:08
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Bharath kumar
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Hi Mfaizan
In your screen shot it is not 0 MPa.Please click your cursor on the Monitor line to get the actual value.
You can adjust your monitor point range by right click on the solver window -> Monitor properties ->Range settings ->adjust Lower bound & Upper bound Value.
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Old   April 3, 2014, 01:13
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Originally Posted by bharath View Post
Hi Mfaizan
In your screen shot it is not 0 MPa.Please click your cursor on the Monitor line to get the actual value.
You can adjust your monitor point range by right click on the solver window -> Monitor properties ->Range settings ->adjust Lower bound & Upper bound Value.
Yes I think this is because of initial pressure and reference pressure values. So it seems that it is zero.
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Old   April 4, 2014, 02:29
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Faizan
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dear bharat,

thanks a lot for your assistance.

Yes after changing range I saw the 1.4MPa value but it I am still confused that with constant 1.4MPa total pressure boundary condition at inlet why this large negative value of pressure is appearing in the model. I checked the lowest value by putting my cursor on the monitor and it is showing -1.7e7. This is crazy. If you can assist then please explain this.

One more question that how can I change the X-axis settings of the pressure monitor tab.

Please reply.
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Old   April 6, 2014, 08:27
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Glenn Horrocks
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When the simulation is partially converged the results can show anything. Don't worry about crazy intermediate results - the final converged solution is all that matters.
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Old   April 6, 2014, 20:20
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Thanks ghorrocks!
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