Problems when modelling flow through syringe, error in dynamic initialization

Sudarsan1805 · September 1, 2015, 02:43

Hi,

I am trying to model the flow of fluid through a syringe. I am using a simple syringe structure, yet I am not able to get results. I think there is an issue with the meshing of the syringe. The error which I get when I initiate dynamic initialization is convergence factor not reached. Also, I have attached the picture of the syringe and the error during the meshing.Capture.jpg

devesh.baghel · September 1, 2015, 07:18

Hi,

Have you really taken only fluid domain for meshed model as posted ?
What is the dimension of syring and mesh size in your simulation ?

Devesh

LuckyTran · September 1, 2015, 17:53

What about using a standard initialization procedure? Shouldn't that still work?

It would be conducive to fix any meshing errors before discussing Fluent errors. Nobody wants to discuss problems with Fluent while your mesh is questionable. It sounds like you have a meshing problem and not a Fluent problem.

Sudarsan1805 · September 2, 2015, 03:19

LuckyTran, Like you said, solving is secondary. There is no point in me trying to solve the problem without the meshing being made accurate

Devesh, I didnt get quite what you meant by Fluid Domain. Sorry, I am just a week into CFD. Can you please elaborate what that means. And the size of the syringe is about 8 cms. I have tried using the default mesh settings , as well as reducing the mesh size upto 0.01 mm and using a 5 deg angle with fine transition. I am still getting the same error.

September 1, 2015, 02:43	Problems when modelling flow through syringe, error in dynamic initialization	#1
Sudarsan1805 New Member Sudir Join Date: Sep 2015 Posts: 3 Rep Power: 11	Hi, I am trying to model the flow of fluid through a syringe. I am using a simple syringe structure, yet I am not able to get results. I think there is an issue with the meshing of the syringe. The error which I get when I initiate dynamic initialization is convergence factor not reached. Also, I have attached the picture of the syringe and the error during the meshing.Capture.jpg Last edited by Sudarsan1805; September 1, 2015 at 02:45. Reason: Forgot to add attachment

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September 1, 2015, 07:18		#2
devesh.baghel Member Devesh Baghel Join Date: Mar 2009 Posts: 84 Rep Power: 17	Hi, Have you really taken only fluid domain for meshed model as posted ? What is the dimension of syring and mesh size in your simulation ? Devesh

September 1, 2015, 17:53		#3
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,761 Rep Power: 66	What about using a standard initialization procedure? Shouldn't that still work? It would be conducive to fix any meshing errors before discussing Fluent errors. Nobody wants to discuss problems with Fluent while your mesh is questionable. It sounds like you have a meshing problem and not a Fluent problem.

September 2, 2015, 03:19		#4
Sudarsan1805 New Member Sudir Join Date: Sep 2015 Posts: 3 Rep Power: 11	LuckyTran, Like you said, solving is secondary. There is no point in me trying to solve the problem without the meshing being made accurate Devesh, I didnt get quite what you meant by Fluid Domain. Sorry, I am just a week into CFD. Can you please elaborate what that means. And the size of the syringe is about 8 cms. I have tried using the default mesh settings , as well as reducing the mesh size upto 0.01 mm and using a 5 deg angle with fine transition. I am still getting the same error.