Timestep Size Variable by User Field Function

trantoan2008 · December 31, 2013, 05:47

Hi all,

I am a beginner in STAR CCM+. I am wondering what is variable of timestep size in user field function of STAR CCM+?

In conditional expression, is it possible to define as below structures?
if Time > T1 then
if position > p1 then...
else if position < p1 then...
else
else if Time < T2 then...
if position > p1 then...
else if position < p1 then...
else
else...

I really appreciate your help.

siara817 · January 3, 2014, 09:25

Your question is not clear. Do you want to know the meaning of time step?

trantoan2008 · January 3, 2014, 10:33

Hi,

In user field function, how can I define time step size variable as velocity variable ($$Velocity) or Temperature variable ($Temperature)?

Best regards

lava12005 · January 5, 2014, 02:32

Hi, the variable is $TimeStep (If I understand your question correctly)

trantoan2008 · January 5, 2014, 23:00

Quote:

Originally Posted by lava12005

Hi, the variable is $TimeStep (If I understand your question correctly)

Hi lava12005,

Thank you for taking your time.
I am wondering that the term of $Timestep is the number of timestep or timestep size?
For user field function, is it possible to define above structure?

Best regards

lava12005 · January 6, 2014, 03:16

Hi ThanhToan,

$TimeStep is the timestep size.
Yes, it is possible to define the above structure, if else is normally defined as

(if condition)
?
(if it is true then do this)
:
(if it false then do this)

For more detail I suggest you have a look on the manual.

December 31, 2013, 05:47	Timestep Size Variable by User Field Function	#1
trantoan2008 Member ThanhToan Join Date: Sep 2010 Posts: 49 Rep Power: 16	Hi all, I am a beginner in STAR CCM+. I am wondering what is variable of timestep size in user field function of STAR CCM+? In conditional expression, is it possible to define as below structures? if Time > T1 then if position > p1 then... else if position < p1 then... else else if Time < T2 then... if position > p1 then... else if position < p1 then... else else... I really appreciate your help.

January 3, 2014, 09:25		#2
siara817 Senior Member siamak rahimi ardkapan Join Date: Jul 2010 Location: Copenhagen, Denmark Posts: 220 Rep Power: 18	Your question is not clear. Do you want to know the meaning of time step? trantoan2008 likes this. __________________ Good luck Siamak

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January 3, 2014, 10:33		#3
trantoan2008 Member ThanhToan Join Date: Sep 2010 Posts: 49 Rep Power: 16	Hi, In user field function, how can I define time step size variable as velocity variable ($$Velocity) or Temperature variable ($Temperature)? Best regards

January 5, 2014, 02:32		#4
lava12005 Senior Member KHB Join Date: Aug 2010 Location: Singapore Posts: 118 Rep Power: 16	Hi, the variable is $TimeStep (If I understand your question correctly)

January 6, 2014, 03:16		#6
lava12005 Senior Member KHB Join Date: Aug 2010 Location: Singapore Posts: 118 Rep Power: 16	Hi ThanhToan, $TimeStep is the timestep size. Yes, it is possible to define the above structure, if else is normally defined as (if condition) ? (if it is true then do this) : (if it false then do this) For more detail I suggest you have a look on the manual.