Design method used in utility at www.filtration...
The user inputs values for all the components of the constant pressure filtration equation AND values for the constants used in the specific resistance and cake concentration equations . The full filtration pressure is used in the calculation of resistance and cake concentration.
In reality, there will be a pressure drop over the cloth and the specific resistance will be lower than predicted by the above assumption but the difference is usually small and the resistance to filtration will be lower than predicted.