CFD Modeling of Solid Suspension in a Stirred Tank: Effect of Drag  Models and Turbulent Dispersion on Cloud Height

<table>Fractional average cloud height (<svg height="14.3625" id="M17" style="vertical-align:-3.2316pt" version="1.1" viewbox="0 0 19.475 14.3625" width="19.475" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.3625)">
<g transform="translate(72,-60.51)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐻</tspan>
</text>
<text transform="matrix(1,0,0,-1,-61.03,60.66)">
<tspan style="font-size: 8.75px; " x="0" y="0">𝑐</tspan>
</text>
</g>
</g>
</svg>/<svg height="10.325" id="M18" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 15.175 10.325" width="15.175" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.325)">
<g transform="translate(72,-63.74)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐻</tspan>
</text>
</g>
</g>
</svg>) as a function of impeller speed normalized by <svg height="14.3875" id="M19" style="vertical-align:-3.25792pt" version="1.1" viewbox="0 0 24.2125 14.3875" width="24.2125" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.3875)">
<g transform="translate(72,-60.49)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑁</tspan>
</text>
<text transform="matrix(1,0,0,-1,-61.31,60.66)">
<tspan style="font-size: 8.75px; " x="0" y="0">J</tspan>
<tspan style="font-size: 8.75px; " x="3.2644961" y="0">S</tspan>
</text>
</g>
</g>
</svg> for the single- and dual-impeller  configurations for 10% (w/w) and 15% (w/w) solids.</table>

International Journal of Chemical Engineering

fig2

Figure 2

Figure 2: CFD Modeling of Solid Suspension in a Stirred Tank: Effect of Drag  Models and Turbulent Dispersion on Cloud Height 