[Aashi171185]

can anyone help me out to monitor the height of free surface during sloshing in cylindrical tank or sloshing wave height as a result of seismic excitation?

[ghorrocks]

You need to define exactly what you mean by height of free surface. Average height over the whole domain? Average height over a boundary face? Height at a specific XY location (assuming gravity is in the Z axis)?

You can do any of these in CFD-Post (as long as you saved the timestep data) or Solver Manager (to track it during run time). You just need to define a mesh identifier (a volume, face or line) and then use volumeInte(volume fraction)@VOLUME, areaInt(volume fraction)@AREA or lineInt(volume fraction)@LINE.

[Aashi171185]

hello sir thanks for your kind reply i have already inserted the volume integral as an expression in cfx pre but it does not include the height of fluid during sloshing means sloshing wave height sir i want to have display of sloshing wave height vs time and also with respect to tank wall height how is this possible in cfx thanks in advance

[ghorrocks]

Please define mathematically what you mean by sloshing wave height and height of fluid during sloshing.

[Aashi171185]

sir i want to track the movement of free surface which is shown in the figure attached below i want to draw the graph of maximum movement of free surface vs height of tank please guide me how to draw the graph in cfd post

[ghorrocks]

Your definition is not very clear.

Maximum movement of what? Does this mean the highest point of the surface? Or a selected point? Or a point which has the largest difference between maximum and minimum heights over time?

Assuming you mean the maximum height of the surface, then define a variable maxVal(y)@<FREE SURFACE ISOSURFACE OBJECT NAME>, then generate a chart using this as the vertical axis and time as the horizontal axis.