10.2: The Limit Deposit Velocity

The Limit Deposit Velocity is defined in this book as the line speed above which there is no stationary or sliding bed. So below this line speed there is either a stationary (small particles) or a sliding (large particles) bed.

The Limit Deposit Velocity can be determined with:

\[\ \mathrm{v}_{\mathrm{l s}, \mathrm{ld v}}=\mathrm{F _ { \mathrm { L } }} \cdot\left(\mathrm{2} \cdot \mathrm{g} \cdot \mathrm{R}_{\mathrm{s d}} \cdot \mathrm{D}_{\mathrm{p}}\right)^{\mathrm{1 / 2}}\]

The value of the LDV can be found in Figure 10.2-1 for a D_p=0.762 m (30 inch) pipe..

Figure 10.2-1: The limit deposit velocity for a D_p=0.762 m (30 inch) pipe.

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