Paper
3-D Investigation of Velocity Profile and Pressure Distribution in Bends with Different Diversion Angle
- Authors:
- Rasoul Daneshfaraz
- Abstract
- This paper describes numerical investigation of velocity profile and pressure distribution of 3-D bends with different diversion angles via CFD model. Reynolds number, diversion angle and section angle, are introduced as important variable parameters of current study. Reynolds number's range was 100 to 1900 and the diversion angles of bends were 90, 135 and 180 degree with regard to inlet flow. The mail goal of current study is to investigate the effect of Reynolds number and the diversion angle on velocity profiles and pressure distribution. It is worth mentioning that the experimental results of former study in a 90-degree bend are used for validating the numerical model. Studies of velocity profiles show that by increasing the section angle, the velocity profile inclines to outer wall, and maximum deviation from inlet velocity profile happens at 45 section angle. Also the maximum velocity occurs at 0.7 to 0.9 of the pipe diameter from inner wall. By increasing the section angle, the pressure profile inclines to outer wall and in this inclination, pressure loss is observed. For low Reynolds numbers, the variation of pressure loss is linear but by increasing the Reynolds number maximum pressure loss happens at limited section angle.
- Keywords
- Confined Flow; Bends; Reynolds Number; Velocity Profiles; Pressure Distribution
- StartPage
- 234
- EndPage
- 240
- Doi