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anyone know the problem of my cavitation flow?

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Old   August 2, 2011, 11:35
Default anyone know the problem of my cavitation flow?
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GARY JANE
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The problem is like that:when i set the saturation pressure as constant in the cavitation,it's fine,but if i set the pressure as the function of temperature ,it always made an error below:

Slave: 2
Slave: 2 Details of error:-
Slave: 2 ----------------
Slave: 2 Error detected by routine MAKDAT
Slave: 2 CDANAM = PSATREL CDTYPE = REAL ISIZE = 903
Slave: 2 CRESLT = OLD
Slave: 2
Slave: 2 Current Directory : /FLOW/PHYSICS/MATERIALS/MT2/ENTHSTAT
.
.
.
+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine MEMERR |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+
anyone know the problem and how to solve it?
Thank you very much!
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Old   August 29, 2011, 17:31
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Quote:
Originally Posted by alloveyou View Post
The problem is like that:when i set the saturation pressure as constant in the cavitation,it's fine,but if i set the pressure as the function of temperature ,it always made an error below:

Slave: 2
Slave: 2 Details of error:-
Slave: 2 ----------------
Slave: 2 Error detected by routine MAKDAT
Slave: 2 CDANAM = PSATREL CDTYPE = REAL ISIZE = 903
Slave: 2 CRESLT = OLD
Slave: 2
Slave: 2 Current Directory : /FLOW/PHYSICS/MATERIALS/MT2/ENTHSTAT
.
.
.
+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine MEMERR |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+
anyone know the problem and how to solve it?
Thank you very much!
You should check if the temperature and pressure of your solution are in the range of valid or not. Take a look at the standard for the thermodynamic properties of water over a wide range of temperature and pressure which is provided by the IAPWS Industrial Formulation 1997. The link to download is:
http://www.cheresources.com/content/...ater-and-steam
I have also worked on the compressible cavitating flows. If you want to use my subroutine developed for IAPWS-IF97 just tell me.
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Old   August 29, 2011, 18:34
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Glenn Horrocks
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Why not use the built-in IAPWS water properties?
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Old   August 30, 2011, 00:58
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Quote:
Originally Posted by ghorrocks View Post
Why not use the built-in IAPWS water properties?
Do you think it is a good way to use the built-in in your fortran code?
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Old   August 30, 2011, 06:11
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Glenn Horrocks
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I do not understand your point. The IAPWS water properties are already available in CFX so you do not need to code anything in fortran to get them. It is available through the GUI. But I guess it is good fortran training
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Old   May 15, 2012, 00:18
Default flash boiling flows
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Quote:
Originally Posted by congtuha View Post
You should check if the temperature and pressure of your solution are in the range of valid or not. Take a look at the standard for the thermodynamic properties of water over a wide range of temperature and pressure which is provided by the IAPWS Industrial Formulation 1997. The link to download is:
http://www.cheresources.com/content/...ater-and-steam
I have also worked on the compressible cavitating flows. If you want to use my subroutine developed for IAPWS-IF97 just tell me.
Hi congtuha,

I am modelling flash boiling flows in CFX. I wonder if I could have your subroutine developed for IAPWS-IF97?

Thanks in advance
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Old   May 15, 2012, 07:42
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Glenn Horrocks
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Um - did you read my posts? You do not need to code IAPWS-97 as it is already in CFX. If you have time to waste then feel free to code it up but I have better things to do with my time.
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Old   May 15, 2012, 15:55
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Quote:
Originally Posted by ghorrocks View Post
Um - did you read my posts? You do not need to code IAPWS-97 as it is already in CFX. If you have time to waste then feel free to code it up but I have better things to do with my time.
Hi ghorrocks,

Thanks for your comment. I thought the mentioned code in previous posts is modification of IAPWS-IF97 which can model "metastable state" present during the cavitation and flash boiling. So the built-in IAPWS is accurate enough to model "metastable state" ?
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Old   May 15, 2012, 19:38
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The IAPWS-97 model is pretty accurate in the metastable region and this is included in the CFX built in model.
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