how to use DEFINE_GEOM to change the geometry with time?

dengdeng · September 13, 2018, 05:08

Hi,
I am simulating the flow around an object deforming with time. The time-dependent function of the boundary is already known(it has the form of y=f(x,t)).
I've got some basic infomation of DEFINE_GEOM on this page:
http:////www.sharcnet.ca/Software/An...fine_geom.html
However, it seems no argument related to time is included in this script. I tried to add the variable time like this:

Code:

DEFINE_GEOM(BL_FP1,domain,dt,position,time)

and the UDF failed to be compiled.
Has anyone worked on similar case before? Any help or suggestion is welcome.
Thank you.

blackmask · September 13, 2018, 06:12

You can use the following code.

Code:

DEFINE_GEOM (BL_FP1, d, dt, position)
{
real time = CURRENT_TIME;



...

}

dengdeng · September 13, 2018, 09:06

It works! Thank you : )

September 13, 2018, 05:08	how to use DEFINE_GEOM to change the geometry with time?	#1
dengdeng New Member Join Date: Apr 2017 Posts: 20 Rep Power: 9	Hi, I am simulating the flow around an object deforming with time. The time-dependent function of the boundary is already known(it has the form of y=f(x,t)). I've got some basic infomation of DEFINE_GEOM on this page: http:////www.sharcnet.ca/Software/An...fine_geom.html However, it seems no argument related to time is included in this script. I tried to add the variable time like this: Code: DEFINE_GEOM(BL_FP1,domain,dt,position,time) and the UDF failed to be compiled. Has anyone worked on similar case before? Any help or suggestion is welcome. Thank you.

September 13, 2018, 06:12		#2
blackmask Senior Member Join Date: Aug 2011 Posts: 421 Blog Entries: 1 Rep Power: 21	You can use the following code. Code: DEFINE_GEOM (BL_FP1, d, dt, position) { real time = CURRENT_TIME; ... } dengdeng likes this.

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September 13, 2018, 09:06		#3
dengdeng New Member Join Date: Apr 2017 Posts: 20 Rep Power: 9	It works! Thank you : )