Hey I was wondering whether there is any equation for viscous liquids (probably derived from energy and mass conservational principles  ) relating the pressure  , rate of volume flow  , area of cross section and height of the liquid (any any other parameters if required) ?

NOTE : I am aware of poisseulles equation but that is not what i am looking for as it relates the pressure gradient to the rate of flow.

                                                                        Thanks in advance.

I was wondering whether there is any equation for viscous liquids (probably derived from energy and mass conservation principles) relating the pressure, rate of volume flow, area of cross section and height of the liquid (or any other parameters if required).

NOTE : I am aware of Poiseuille's law, but that is not what I am looking for as it relates the pressure gradient to the rate of flow.