Rayleigh Taylor Instability UDF

nishith · February 22, 2010, 01:26

hi , I am studying R T instability and for that i have written UDF for creating a sinusoidal interface between the two liquids, the udf was interpreted well and after hooking i can see the sinusoidal interface by contours-----> phase. After doing all this when i start iterations, just after the first iteration all the things are getting vanished, in the sense now the lower fluid has taken place in all over the domain by vanishing the upper one, now i don't know the problem.

may be i am lagging some where in defining UDF but i have used UDF in only initialization and as i can see the sinusoidal interface i think its working well but if its working well then whats the problem ????????????

Please help,

Thanks

shahjehan · March 28, 2015, 09:20

you can introduce sinusoidal pattern at centre through gambit geometry by making sinusoidal pattern of lines.

February 22, 2010, 01:26	Rayleigh Taylor Instability UDF	#1
nishith New Member nishith dulet Join Date: Feb 2010 Posts: 4 Rep Power: 16	hi , I am studying R T instability and for that i have written UDF for creating a sinusoidal interface between the two liquids, the udf was interpreted well and after hooking i can see the sinusoidal interface by contours-----> phase. After doing all this when i start iterations, just after the first iteration all the things are getting vanished, in the sense now the lower fluid has taken place in all over the domain by vanishing the upper one, now i don't know the problem. may be i am lagging some where in defining UDF but i have used UDF in only initialization and as i can see the sinusoidal interface i think its working well but if its working well then whats the problem ???????????? Please help, Thanks

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March 28, 2015, 09:20		#2
shahjehan New Member Syed Shah Jehan Gillani Join Date: Oct 2014 Posts: 15 Rep Power: 12	you can introduce sinusoidal pattern at centre through gambit geometry by making sinusoidal pattern of lines.