I am solving a Open channel Multiphase(water and air) VOF problem. i am interested in plotting Total Force at a point vs time plots.The point i have chosen is on a wall perpendicular to the flow direction. Solution#2049647 guides to plot the same.The solution also suggest to sum both viscous and pressure force, irrespective of direction. I am also interested in adding dynamic force along with pressure and Viscous force. How shall i proceed writing CFF(Custom field function) for the same. After find this how to validate the results, is there a benchmark problem to validate the force plots.Kindly do the needful.