Problem statement: Simulate CFD cylindrical heat pipe with wick. The boundary conditions that apply to this problem are listed below:- 1. The internal wall: r =Ri Ur=U0 = 0 T =

T1 = THOT (assume any temperature) 2. The external wall: r =Ro Ur=U0=0 T = T2 = TCOLD (assume any temperature) Assumption: The flow is assumed to be 3D, steady, laminar. • The working fluid is presumed to be Newtonian and incompressible. (water) • It is assumed that the effect of the shell thickness is neglected • It is assumed that no condensation occurs in the study domain. • It is assumed that there is no heat generation source inside the heat pipe. • Viscous dissipation in the energy equation is neglected.