Abstract
Turbulent characteristics of a reattached flow separated from a rib in an air flat channel were numerically analyzed by RANS and LES methods. The both methods showed low pressure regions in corners formed by the rib and the channel walls that caused a vorticity tube to be formed along the rib. Nevertheless in RANS, a reattached flow was identified as two-dimensional with a velocity decreasing near the channel bottom wall. In LES, the low pressure regions caused transverse and normal motions in the separation region that resulted in redistributions between velocity components, Reynolds stresses and the velocity decrease near the channel bottom wall, i.e., the formation of three-dimensional reattached flow.
Highlights
Separated flows are common in several engineering applications such as aircraft wings, turbine and compressor blades, diffusers, buildings, suddenly expanding pipes, combustors, etc
The present study aims to show distinctions of the same reattached flow behind a rib, applying RANS
Fluid was sucked into these regions, which were the sources of a vorticity tube formed along the rib, involved into the tube and issued in the middle part of the channel
Summary
Separated flows are common in several engineering applications such as aircraft wings, turbine and compressor blades, diffusers, buildings, suddenly expanding pipes, combustors, etc. Лыкова Национальной академии наук Беларуси, Минск, Республика Беларусь 2Институт теплофизики им. RANS showing a good correlation of integral parameters (velocity, reattachment length) with experiment, shades structure features of flow.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
