کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1735762 | 1016192 | 2009 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Detailed measurement of heat/mass transfer with continuous and multiple V-shaped ribs in rectangular channel Detailed measurement of heat/mass transfer with continuous and multiple V-shaped ribs in rectangular channel](/preview/png/1735762.png)
Effects of aspect ratio on heat/mass transfer were investigated in rectangular channels with two different V-shaped rib configurations, which are continuous V-shaped rib configuration with a 60° attack angle, and multiple (staggered) V-shaped rib configuration with a 45° attack angle. The square ribs were attached on the test section in a parallel manner. A naphthalene sublimation method was used to measure the local heat/mass transfer coefficients. For the continuous V-shaped rib configuration, two pairs of counter-rotating vortices were generated in the channel, and high transfer region was formed at the center of the ribbed walls. However, for the multiple V-shaped rib configuration with 45° attack angle, asymmetric secondary flow patterns were generated due to its geometric features, resulting in uniform heat/mass transfer distributions. The effect of channel aspect ratio was more significant for the continuous 60° V-shaped rib than for the multiple 45° V-shaped rib configuration.
Journal: Energy - Volume 34, Issue 11, November 2009, Pages 1770–1778