Fluent UDF particle wall distance

Achini · October 22, 2020, 15:17

Hello!

I am working on a problem where I need to calculate the particle wall distance from each particle position.
Can anyone please tell me how to find the distance from the particle position to the wall boundary?
Is there a specific macro I can use for that?

Thank you!

AlexanderZ · October 23, 2020, 05:06

I don't know any specific macros or approaches for that, but what you can do is:
1. make a loop over particles
2. get coordinate of each particle
3. calculate the distance to the wall (cause you know coordinates of wall)
hope this simple approach will work for you

Achini · November 20, 2020, 12:34

Thank you for your reply.

do you know how to get the minimum distance from particle to boundary wall?

I want to get particle wall distance inside a define_bodyforce macro, to calculate the body force.
Is there a direct command other than finding the minimum distance via coordinates?

Thank you!

October 22, 2020, 15:17	Fluent UDF particle wall distance	#1
Achini Member L.A.Isanka Join Date: Jul 2020 Posts: 55 Rep Power: 6	Hello! I am working on a problem where I need to calculate the particle wall distance from each particle position. Can anyone please tell me how to find the distance from the particle position to the wall boundary? Is there a specific macro I can use for that? Thank you!

October 23, 2020, 05:06		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	I don't know any specific macros or approaches for that, but what you can do is: 1. make a loop over particles 2. get coordinate of each particle 3. calculate the distance to the wall (cause you know coordinates of wall) hope this simple approach will work for you Achini likes this. __________________ best regards ****************************** press LIKE if this message was helpful

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November 20, 2020, 12:34		#3
Achini Member L.A.Isanka Join Date: Jul 2020 Posts: 55 Rep Power: 6	Thank you for your reply. do you know how to get the minimum distance from particle to boundary wall? I want to get particle wall distance inside a define_bodyforce macro, to calculate the body force. Is there a direct command other than finding the minimum distance via coordinates? Thank you!