On the Additional Loss at the Entry of a Pipe in the Case of Non-Newtonian Laminar Flow

Abstract

Prof. Iwanami has minutely made the experimental and theoretical studies on the additional loss at the entry of a pipe, through which Newtonian fluid flows slowly. However, on the theoretical treatment of the additional loss at the entry in the case of non-Newtonian laminar flow, no attempt has ever been undertaken by anyone, as far as the author's knowledge is concerned. Assuming the velocity distributions so as to satisfy the boundary conditions and the equation of continuity, and treating this problem from the standpoint of energy dissipation, the author found the relation between the rheological constant and the equivalent length of additional loss at the entry of a pipe.