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Old   April 27, 2013, 00:13
Default transient data plots
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Jason
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Hi All,

I am working on diesel cyclic simulation. Recently, I would like to plot contour of fuel concentration and equivalence ratio from the transient data (*.ccmt). However, I use multi compound as fuel in the simulation such as n-c7h16 and ic8h18. I don't know how to plot. Please give some ideas.

Thank you in advance.
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Old   April 27, 2013, 07:38
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zheng jianjun
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use "operate" command
such as
...
operate getc,conc,1,1 !fuel 1
operate getc,conc,2,2 !fuel 2
operate add 1,2,4 !fuel1+fuel 2
...
cplot

Quote:
Originally Posted by lunar1984 View Post
Hi All,

I am working on diesel cyclic simulation. Recently, I would like to plot contour of fuel concentration and equivalence ratio from the transient data (*.ccmt). However, I use multi compound as fuel in the simulation such as n-c7h16 and ic8h18. I don't know how to plot. Please give some ideas.

Thank you in advance.
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Old   April 27, 2013, 23:16
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Quote:
Originally Posted by skylent View Post
use "operate" command
such as
...
operate getc,conc,1,1 !fuel 1
operate getc,conc,2,2 !fuel 2
operate add 1,2,4 !fuel1+fuel 2
...
cplot
Hi Skylent,
I know you are one of the expert here. lol
would you please check the code as following? Thank you very much.


!Plot cell-averaged equivalence ratio
*set,safr, 15.07 !stoichiometry air fuel ratio (average of C7 and C8)
!the mass fraction of heptane vapor
operate,getc,conc,1,1

!the mass fraction of isooctane vapor
operator,getc,conc,2,31

!the mass fraction of oxygen-- last number match the scalar in the mechanism
operate,getc,conc,3,2
!
!sum of fuel vapor
operate,add,1,2,4

!the mass fraction of air in the cell=m_O2/0.2331
operate,smultiply,4.291845494,2,5

operate,divide,4,5,6 !F/A =fuel_air ratio
operate,smultiply,safr,6,7 !phi=F/A*sto_A/F
...
...
...
cplot

Last edited by lunar1984; April 29, 2013 at 21:31.
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Old   April 27, 2013, 23:48
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Jason
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scalar 1 "C7H16"
scalar 2 "O2"
scalar 31 "IC8H18"

additional question: cplot is the command which just plots the concentration of the last "register number", right? Thanks.

Last edited by lunar1984; April 28, 2013 at 00:06.
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Old   April 28, 2013, 02:10
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zheng jianjun
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cplot is the command which just plots the scalar in "register 4".
and all the register we used is only from register 1~register 6,no register 7
so change the last operate command line as "operate,smultiply,safr,6,4"

bless
-----------------------------------------------------------------
Quote:
Originally Posted by lunar1984 View Post
Hi Skylent,
I know you are one of the expert here. lol
would you please check the code as following? Thank you very much.


!Plot cell-averaged equivalence ratio
*set,safr, 15.07 !stoichiometry air fuel ratio (average of C7 and C8)
!the mass fraction of heptane vapor
operate,getc,conc,1,1

!the mass fraction of isooctane vapor
operator,getc,conc,2,31

!the mass fraction of oxygen-- last number match the scalar in the mechanism
operate,getc,conc,3,2
!
!sum of fuel vapor
operate,add,1,2,4

!the mass fraction of air in the cell=m_O2/0.2331
operate,smultiply,4.291845494,2,5

operate,divide,4,5,6 !F/A =fuel_air ratio
operate,smultiply,safr,6,7 !phi=F/A*sto_A/F
!spoint 0 0 0
!snormal 0 1 0 !
cset, all
caverage, cset
poption,contour !
pltype,section !
angle 0 !
view snormal !
cplot
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Old   April 28, 2013, 08:58
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Jason
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If change to "operate, safr, 6, 4 " , then we will have two "register 4". the other one is
!sum of fuel vapor
operate,add,1,2,4

Is it still fine?? which one will be showed in cplot??

Additionally, in order to plot [OH] "scalar 8", is it still fine to use ......
operate, getc,conc,4,8 (since I checked, "getc,conc,8" doesn't work)
...
...
cplot


Thank you very much.


Quote:
Originally Posted by skylent View Post
cplot is the command which just plots the scalar in "register 4".
and all the register we used is only from register 1~register 6,no register 7
so change the last operate command line as "operate,smultiply,safr,6,4"

bless
-----------------------------------------------------------------
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Old   April 29, 2013, 01:29
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zheng jianjun
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It is fine, as register 4 can be used repeatly and the content in register can be overrided.
Cplot command ONLY can plot the scalar in register 4,or vector in register 1~3,as I mentioned before.
bless.
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