A study on the flow characteristics of non-Newtonian fluid flows in dividing tubes

J. Ocean Eng. Technol. 1996;10(4):118-127.

분기관에서 비뉴턴 유체의 유동특성에 관한 연구

이행남,하옥남,전운학

조선대학교 선박해양공학과,조선대학교 기계공학과,국민대학교 기계설계학과

Keywords: Visualization, Viscoelastic fluid, Dividing angle, Separation zone, Energy loss coefficient

핵심용어: 가시화, 점성탄 유체, 분기 각도, 박리 구역, 에너지 손실 계수

Abstract

Flow patterns of fluid flow in dividing trbe were visualized, and the energy losses due to dividing were measured in laminar dividing flow of the viscoelastic fluid and its solution in tube junctions with dividing angles of $90^{circ}$, $60^{circ}$, $65^{circ}$ and $15^{circ}$. Two separation zones were observed. swelling of the streamline to the main tube or to lateral tube was observed. The sizes of the separation zones depend on the Reynolds number, the dividing angle and the dividing flow rate. The energy loss coefficients decrease with increasing Reynolds number, but their decreasing rate decreases with increasing Reynolds number as the sizes of the separation zone increase. The effect of dividing angle on the energy loss coefficients and separation is greater for main tube than for the lateral tube.