CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   CFX (http://www.cfd-online.com/Forums/cfx/)
-   -   what are these in property RGP table? (http://www.cfd-online.com/Forums/cfx/22883-what-these-property-rgp-table.html)

prayskyer July 25, 2006 03:28

what are these in property RGP table?
 
In cfx help,the chapter of "Organisation of RGP File" some of as followed:

$TABLE_1 5 5 240.0000000000000 280.0000000000000 320.0000000000000 360.0000000000000 400.0000000000000

55000.00000000000 141250.0000000000 227500.0000000000 313750.0000000000 400000.0000000000

380537.4694438053 411338.2663531548 444977.3409773413 481319.1776109927 520216.5694145825 389653.7412125674 409809.2455431806 443799.3654908382 480400.4939131565 519497.1970340972 397134.4582379403 408220.8885809304 442595.4896125616 479470.0507244235 518772.4705830857 402478.8117714382 406565.3815292667 441363.8343756341 478527.3570462614 518042.2612321422 406650.5418732642 406650.5418732642 440102.2828142202 477571.8870479560 517306.4350445317

234.5147959861216 254.6474401194407 266.4385386783982 275.1224493134379 282.1192618430768

376541.6333194062 389653.7412125674 397134.4582379403 402478.8117714382 406650.5418732642

those are the data part of RGP files,could anyone tell me the five part data's meaning,T ,P,H,or Cp?

thanks a lot~

deLuther July 25, 2006 03:45

Re: what are these in property RGP table?
 
Just see carefully description of RGP file format. First two arrays is tempeature (in K) and pressure (absolute, as I remember) respectively. There must be Cp and Cv and some other tables (some derivatives). Just see all documentation regarding to RGP. It is easy to write own convertor(RGP generator if you have some routines for properties) basing on included documentation.

prayskyer July 25, 2006 04:17

Re: what are these in property RGP table?
 
i think there must have a order, for example,first, temp,sencod pa,and then Cp,…….

thanks for what u told me,:)

HekLeR July 29, 2006 10:22

Re: what are these in property RGP table?
 
There is a fortran example in the same documentation (maybe a few pages previous to what you have posted) which tells you exactly how to read this. The order should be clear from that. Documentation previous to that example should be clear about what each table is (1 through to 9).

Basically the order for each table is

table_1
nt tp
temperature values, pressure values, property values
table_2
nt np
temperature values, pressure values, property values
table_3
nt np
temperature values, pressure values, property values
...

deLuther July 30, 2006 14:30

Re: what are these in property RGP table?
 
Maybe some corrections + Tsaturation (np values - i.e. equal to number of pressure points), Property saturation values. So: table i nt np t values (nt) p values (np) property values (nt x np) tsat values (np) propsat values (np)

prayskyer August 2, 2006 22:17

Re: what are these in property RGP table?
 
i will try to find that Fortran example,thanks~

could i ask what is "nt np" the meaning?

is those in that CEL language?

thanks a lot~!

deLuther August 8, 2006 06:48

Re: what are these in property RGP table?
 
nt - number of temperature points np - number of pressure points For saturation data (in first 9 tables) Tsat and according parameter is computed for each pressure point. And there can be data in two phase region (so called saturation table), but I don`t know if solver can account for this data (or solver can be operate only in superheated region). As for fortran example - in documentation there is part of fortran code for writing data.

HekLeR August 8, 2006 22:52

Re: what are these in property RGP table?
 
deLuther, thanks, it was late and I was doing it from memory, not the doc...


All times are GMT -4. The time now is 00:00.