Small boat with DBFI FLOATING POINT EXCEPTION

eleazar · September 2, 2011, 09:31

Hi

A friend of mine did a small examble of the small boat examble but he get a floating point error.....

I create a better mesh but i do not know why he gets the same error ! ! !

do you think that we have to apply a very fine mesh in the sea level?????

any idea?

ping · September 3, 2011, 02:32

VOF and DBFI can be used in very coarse mesh (eg 50k cells is feasible to check everything is working - runs very fast) - just reduces the accuracy and ability to capture the waves. Check all you settings compared to the boat DFBI tutorial in the Help - it is very easy to miss one of the steps or settings.

eleazar · September 3, 2011, 04:05

In my help file there is not tutorial with the Boat, i just have the small boat model but i might miss of something,

can you provide me this help file? or is there anywhere online?

thanks

abdul099 · September 3, 2011, 07:58

On the start page of your help, you will find a tutorials section (nearly at the bottom) where you should find a dynamic fluid body interaction node. The boat in head waves tutorial is a sub-node of dfbi.

All files necessary to run the tutorials are also provided with the ccm+ installation. Just open the installation folder and click through some folders - you will find it for sure.

September 2, 2011, 09:31	Small boat with DBFI FLOATING POINT EXCEPTION	#1
eleazar Member Elena Cortin Join Date: Mar 2009 Location: Paris Posts: 65 Rep Power: 17	Hi A friend of mine did a small examble of the small boat examble but he get a floating point error..... I create a better mesh but i do not know why he gets the same error ! ! ! do you think that we have to apply a very fine mesh in the sea level????? any idea?

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September 3, 2011, 02:32		#2
ping Senior Member Ping Join Date: Mar 2009 Posts: 556 Rep Power: 20	VOF and DBFI can be used in very coarse mesh (eg 50k cells is feasible to check everything is working - runs very fast) - just reduces the accuracy and ability to capture the waves. Check all you settings compared to the boat DFBI tutorial in the Help - it is very easy to miss one of the steps or settings.

September 3, 2011, 04:05		#3
eleazar Member Elena Cortin Join Date: Mar 2009 Location: Paris Posts: 65 Rep Power: 17	In my help file there is not tutorial with the Boat, i just have the small boat model but i might miss of something, can you provide me this help file? or is there anywhere online? thanks

September 3, 2011, 07:58		#4
abdul099 Senior Member Join Date: Oct 2009 Location: Germany Posts: 636 Rep Power: 21	On the start page of your help, you will find a tutorials section (nearly at the bottom) where you should find a dynamic fluid body interaction node. The boat in head waves tutorial is a sub-node of dfbi. All files necessary to run the tutorials are also provided with the ccm+ installation. Just open the installation folder and click through some folders - you will find it for sure.