Outlet Pressure BC dependent from velocity

ing.nicola.dettole · January 20, 2019, 14:14

hI,
is possible to assign Pressure value on a patch based on a user-defined function of velocity in this patch ?

p at outlet patch = f_user (U at outlet patch)...

FM_Stiral · December 20, 2019, 04:13

Hi Nicola,

Yes it is. You need to install swak4foam and in the P file (0 directory) in outlet patch part, set :

type groovyBC;
valueExpression "f(U)";
value your initial value;

And in your controlDict file, add

libs (
"libOpenFOAM.so"

"libSimpleSwakFunctionObjects.so"

"libswakFunctionObjects.so"

"libgroovyBC.so"
)

(not sure for all librarie adds but it works for me).

The next problem will be the convergence (my current step...)

Sincerly

January 20, 2019, 14:14	Outlet Pressure BC dependent from velocity	#1
ing.nicola.dettole New Member Nicola D'Ettole Join Date: Nov 2018 Posts: 12 Rep Power: 7	hI, is possible to assign Pressure value on a patch based on a user-defined function of velocity in this patch ? p at outlet patch = f_user (U at outlet patch)...

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December 20, 2019, 04:13		#2
FM_Stiral New Member Frédéric MR Join Date: Jun 2019 Posts: 18 Rep Power: 6	Hi Nicola, Yes it is. You need to install swak4foam and in the P file (0 directory) in outlet patch part, set : type groovyBC; valueExpression "f(U)"; value your initial value; And in your controlDict file, add libs ( "libOpenFOAM.so" "libSimpleSwakFunctionObjects.so" "libswakFunctionObjects.so" "libgroovyBC.so" ) (not sure for all librarie adds but it works for me). The next problem will be the convergence (my current step...) Sincerly