Fluid flow and heat transfer in an axially rotating pipe: the rotational entrance

The complex interactions between turbulence and rotation in the rotational entrance region of a pipe, rotating about its axis, are examined. By assuming, a universal tangential velocity profile and with the use of a modified mixing length theory, the development of the axial velocIty profile and the heat transfer coefficient along the rotational entrance length are calculated. The theoretical results are compared with experimental flndings of Reich