Effects of Centrifugal Buoyancy and Reynolds Number on Turbulent Heat Transfer in a Two-Pass Angled-RIB-Roughened Channel with Sharp 180° Turns Investigated by Using Large Eddy Simulation

<table>Buoyancy effect on area-averaged Nusselt number at developed region in straight passes  (Averaging area was between 5th and 6th ribs from straight pass entrance. Open, filled, half-filled, and concentric symbols are for (<svg height="14.375" id="M200" style="vertical-align:-3.13504pt" version="1.1" viewbox="0 0 24.7125 14.375" width="24.7125" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.375)">
<g transform="translate(72,-60.5)">
<text transform="matrix(1,0,0,-1,-71.95,63.67)">
<tspan style="font-size: 12.50px; " x="0" y="0">R</tspan>
<tspan style="font-size: 12.50px; " x="8.3395014" y="0">o</tspan>
</text>
<text transform="matrix(1,0,0,-1,-57.36,60.55)">
<tspan style="font-size: 8.75px; " x="0" y="0">∗</tspan>
</text>
</g>
</g>
</svg>, <svg height="12.925" id="M201" style="vertical-align:-1.90608pt" version="1.1" viewbox="0 0 12.325 12.925" width="12.325" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,12.925)">
<g transform="translate(72,-61.66)">
<text transform="matrix(1,0,0,-1,-71.95,63.61)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑄</tspan>
</text>
</g>
</g>
</svg>, smooth/rib) = (3500, 2, smooth), (1000, 1, rib), (3000, 1, rib), and (4000, 2, rib), resp.  Symbols with solid and broken lines are for aiding and opposing buoyancy contributions, resp.).</table>

International Journal of Rotating Machinery

fig9

Figure 9

Figure 9: Effects of Centrifugal Buoyancy and Reynolds Number on Turbulent Heat Transfer in a Two-Pass Angled-RIB-Roughened Channel with Sharp 180° Turns Investigated by Using Large Eddy Simulation 

Figure 9 | Effects of Centrifugal Buoyancy and Reynolds Number on Turbulent Heat Transfer in a Two-Pass Angled-RIB-Roughened Channel with Sharp 180° Turns Investigated by Using Large Eddy Simulation 