[cfdamateur]

I am trying to simulate regimes occurring after a drop falls on a liquid pool using in-house code. However there seem to errors in the solution -

1.) We are using levels set approach to get the interface. However we are getting mass loss in the drop (we are reinitializing the level set.)

2.) The drop, when it reaches near the pool, suddenly shoots upwards. This is against gravity.

Please help me to find why we are getting these errors.

Time step - 10E-7
Grid - 450*1000

[mprinkey]

Originally Posted by cfdamateur

I am trying to simulate regimes occurring after a drop falls on a liquid pool using in-house code. However there seem to errors in the solution -

1.) We are using levels set approach to get the interface. However we are getting mass loss in the drop (we are reinitializing the level set.)

2.) The drop, when it reaches near the pool, suddenly shoots upwards. This is against gravity.

Please help me to find why we are getting these errors.

Time step - 10E-7
Grid - 450*1000

I don't think anyone can offer much advice to you given so little information. Do you have a reference for the algorithm that your code implements? Is your grid Cartesian? Is there grid stretching? What is the density ratio between the two fluids?

[cfdamateur]

Originally Posted by mprinkey

I don't think anyone can offer much advice to you given so little information. Do you have a reference for the algorithm that your code implements? Is your grid Cartesian? Is there grid stretching? What is the density ratio between the two fluids?

Ohk..sorry for that. So we are trying to implement coupled level set volume of fluid method on an axisymmetric case. Our grid is Cartesian and I guess no grid stretching. Two fluids are water and oil so density ratio (oil/water) of about 0.86.