Hello,<\/p>\n
<\/p>\n
The interface in my VOF simulation involving liquid-vapor appears to be spread over three to four cells.<\/p>\n
<\/p>\n
The simulation is converging as the residuals fell below default settings and the area of the interface has become constant with further iterations\/timesteps.<\/p>\n
<\/p>\n
The fluid properties of both liquid and vapor are the same. Vapor lying above liquid. Gravity is considered.<\/p>\n
<\/p>\n
I am using PISO\/LeastSquareCell\/SecondOrder\/GeoReconstruct\/Warped-FaceGradientCorrection\/HigherOrderTimeRelaxation; Explicit VOF formulation with implicitBodyForce; and A timeStep of 1e-06 s. Mesh is 3D unstructured – tetrahedrons<\/p>\n
<\/p>\n
I want the interface( 0<VOF<1) to appear sharp, i.e., it should be within one or two cells atmost.<\/p>\n
<\/p>\n
To achieve it, I tried the following:<\/p>\n
<\/p>\n
1) Refining the mesh in Workbench and running new simulations. Though I achieve convergence, the interface is not sharp<\/p>\n
<\/p>\n
2) Adapting the mesh in Fluent. As soon as I adapt the mesh using GradientAdaptation, I am not achieving convergence even with lower timesteps and the interface appears wavy.<\/p>\n
<\/p>\n
I request help on how to get a sharp interface, i.e., the region 0<VOF<1 should lie within one or two cells.<\/p>\n
<\/p>\n
<\/p>\n
<\/p>\n
Thanks & Regards,<\/p>\n
<\/p>\n
Vidyadhar<\/p>\n
<\/p>\n
<\/p>\n","protected":false},"template":"","class_list":["post-37747","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t