Shell Side Fluid Velocity of Baffled HX & Re -- Nobody knows last resort Problem: I need to know how to calculate the shell side fluid velocity for a Shell&Tube HX with *Baffles*. Also, the reynolds number for this flow Known: ms -Mass flow on shell side Nt -Number of tubes Lt -Length of tube bundle Nb - Number of Baffles Dis -Inside Diameter of Shell Vs -Volumetric flow rate --Also I know all fluid properties for shell side fluid i.e. Cp, rho, viscosity.... Comments: I have completed this for the tube side it was very simple but the shell side is difficult and can not find any equations to apply. Design Engineer needing help!!!