Inflating parachute 2d

Khizam · May 29, 2018, 22:57

Hi everyone.can anyone help how to simulate an inflating parachute 2d in fluent.pls help me.

obscureed · May 30, 2018, 08:03

Hi Khizam,

I'm interested in any positive answers you receive, but I'll write a negative one in case there are none.

This is a *very* difficult problem. It probably does not require any UDF or Scheme, so you are asking on the wrong forum, but even I know that this is a very difficult problem.

Your first step should be a literature survey. Have you tried this? Can you point us to any related work that you would like to copy or improve on? If there is nothing even slightly similar, this should alert you to the idea that it could be a multi-year project.

Good luck!
Ed

Khizam · May 30, 2018, 08:51

Thank you so much for ur guidance. Ok I have another question to u. I have a parabolic 2d surface at the centre of the domain. Can I move that surface down the domain during to gravity in fluent,if possible could u pls tell me how to do that.

Regards
Mohamed Khizam

obscureed · May 30, 2018, 10:03

Hi Khizam,

I'm guessing that you are just starting out at CFD and Fluent. It would be best if you could complete some basic tutorials on that, and then ask some specific questions on the appropriate forum if necessary.

Best regards,
Ed

Khizam · May 30, 2018, 10:07

Yes I completed some tutorials. The problem was, in the console it is showing "updating dynamic meshing is failed.negative cell volume is detected." But the mesh didn't contain negative volume. But may be remeshing it may be negative. So I kindly tell me how to solve that.

Regards
Mohamed Khizam

obscureed · May 31, 2018, 03:49

Hi Mohamed Khizam,

As I have said, I think this is probably the wrong forum, and the thread name no longer matches the question. I suggest you start a new question in the general Fluent forum. It will help if you explain some basic details of how far you have got and what you are trying to achieve.

I have a general observation: it is much easier to move air past a stationary obstacle in a model, rather than moving the obstacle through stationary air. The effect on drag should be the same. However, I do not intend to answer more questions in this thread.

Good luck!
Ed

May 29, 2018, 22:57	Inflating parachute 2d	#1
Khizam New Member Mohamed khizam Join Date: Aug 2017 Posts: 3 Rep Power: 8	Hi everyone.can anyone help how to simulate an inflating parachute 2d in fluent.pls help me.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[ANSYS Meshing] What and how to use sweep mesh by inflating the boundaries?	alvinthum	ANSYS Meshing & Geometry	2	March 26, 2018 05:30
how to tell the parison to stop inflating upon contacting the mould in ANSYS Polyflow	andrade.silva	ANSYS	0	August 31, 2017 13:29
How do I choose better turbulence model for parachute with a vent ?	EvanHuang	FLUENT	1	May 18, 2017 01:33
inflating balloon	anbu2cfd	FLUENT	0	April 19, 2014 06:46
Parachute drag data	Abuzar Adid	Main CFD Forum	3	July 27, 2013 07:33

May 30, 2018, 08:03		#2
obscureed Senior Member Join Date: Sep 2017 Posts: 246 Rep Power: 11	Hi Khizam, I'm interested in any positive answers you receive, but I'll write a negative one in case there are none. This is a very difficult problem. It probably does not require any UDF or Scheme, so you are asking on the wrong forum, but even I know that this is a very difficult problem. Your first step should be a literature survey. Have you tried this? Can you point us to any related work that you would like to copy or improve on? If there is nothing even slightly similar, this should alert you to the idea that it could be a multi-year project. Good luck! Ed

May 30, 2018, 08:51		#3
Khizam New Member Mohamed khizam Join Date: Aug 2017 Posts: 3 Rep Power: 8	Thank you so much for ur guidance. Ok I have another question to u. I have a parabolic 2d surface at the centre of the domain. Can I move that surface down the domain during to gravity in fluent,if possible could u pls tell me how to do that. Regards Mohamed Khizam

May 30, 2018, 10:03		#4
obscureed Senior Member Join Date: Sep 2017 Posts: 246 Rep Power: 11	Hi Khizam, I'm guessing that you are just starting out at CFD and Fluent. It would be best if you could complete some basic tutorials on that, and then ask some specific questions on the appropriate forum if necessary. Best regards, Ed

May 30, 2018, 10:07		#5
Khizam New Member Mohamed khizam Join Date: Aug 2017 Posts: 3 Rep Power: 8	Yes I completed some tutorials. The problem was, in the console it is showing "updating dynamic meshing is failed.negative cell volume is detected." But the mesh didn't contain negative volume. But may be remeshing it may be negative. So I kindly tell me how to solve that. Regards Mohamed Khizam

May 31, 2018, 03:49		#6
obscureed Senior Member Join Date: Sep 2017 Posts: 246 Rep Power: 11	Hi Mohamed Khizam, As I have said, I think this is probably the wrong forum, and the thread name no longer matches the question. I suggest you start a new question in the general Fluent forum. It will help if you explain some basic details of how far you have got and what you are trying to achieve. I have a general observation: it is much easier to move air past a stationary obstacle in a model, rather than moving the obstacle through stationary air. The effect on drag should be the same. However, I do not intend to answer more questions in this thread. Good luck! Ed