自然対流を伴う水平円管内脈動流れの流動形態

概要

論文の詳細を見る
Free convection in a heated horizontal tube of laminar flow is caused by buoyancy forces due to the temperature differences between the pipe wall and the fluid. However, it was shown experimentally in previous papers (1994, 1995) that free convection in both a steady flow and a pulsating flow occurs when the temperature differences between air in a room and water in an unheated pipe are large. Moreover, the above phenomenon was also shown in numerical analyses for both a steady flow and a pulsating flow by the present author and colleagues previously (1994, 1997). To investigate flow patterns of pulsating flows in this paper, numerical analysis is made in the case that an amplitude of an oscillating velocity is large in comparison with the previous paper (1997), and the distributions of velocity, temperature, streamline and isotherm are shown schematically. Furthermore, the profiles of velocity and temperature gradients at the wall under the influences of frequency are presented in this paper.
一般社団法人日本機械学会の論文
1999-07-25