Divergence x momentum

raguraam · December 17, 2017, 12:05

I am trying to simulate diesel spray with DPM in 2D axisymmetric model. Boundary condition is axis for x=0 and three wall no slip boundary conditions..time step is 1 microsecond ..solution is diverging for x momentum after few time steps..please help me to solve this ..thanks in advance

LuckyTran · December 18, 2017, 12:15

Quote:

Originally Posted by raguraam

Boundary condition is axis for x=0 and three wall no slip boundary conditions..

Is that a typo? In 2D, only the y=0 axis (or the x-axis) can be the axissymmetric BC. A simple rotation of the mesh will fix this problem.

raguraam · December 18, 2017, 20:25

Yes it’s a typo .y=0 sorry . So all the nodes are above y Axis and still the problem persists..please help me in this

December 17, 2017, 12:05	Divergence x momentum	#1
raguraam New Member Raguraam Sugavanam Join Date: Dec 2017 Posts: 5 Rep Power: 8	I am trying to simulate diesel spray with DPM in 2D axisymmetric model. Boundary condition is axis for x=0 and three wall no slip boundary conditions..time step is 1 microsecond ..solution is diverging for x momentum after few time steps..please help me to solve this ..thanks in advance

December 18, 2017, 20:25	Divergence x momentum	#3
raguraam New Member Raguraam Sugavanam Join Date: Dec 2017 Posts: 5 Rep Power: 8	Yes it’s a typo .y=0 sorry . So all the nodes are above y Axis and still the problem persists..please help me in this Last edited by raguraam; December 19, 2017 at 21:02.

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