Question

The results of a batch settling test are shown in the following table: Solid concentration, C Superficial particle velocity, 0.05 0.10 0.15 0.20 0.25 0.30 $U_{ps}$ (mm s$^{-1}$) 0.023 0.036 0.043 0.046 0.039 0.035 where solid concentration, C, is defined to be (1 - $\varepsilon$) and $\varepsilon$ is the voidage of the suspension. (a) Based on these data, determine the exponent, n, in the Richardson-Zaki correlation and the single particle terminal velocity, $U_T$, of the particles in the suspension. (15 marks) (b) Hence, or otherwise, determine the velocity of propagation of a layer of solids with concentration 0.2 in the suspension. (10 marks)

          The results of a batch settling test are shown in the following table:
Solid concentration, C Superficial particle velocity,
0.05
0.10
0.15
0.20
0.25
0.30
$U_{ps}$ (mm s$^{-1}$)
0.023
0.036
0.043
0.046
0.039
0.035
where solid concentration, C, is defined to be (1 - $\varepsilon$) and $\varepsilon$ is the voidage of the suspension.
(a) Based on these data, determine the exponent, n, in the Richardson-Zaki correlation and
the single particle terminal velocity, $U_T$, of the particles in the suspension. (15 marks)
(b) Hence, or otherwise, determine the velocity of propagation of a layer of solids with
concentration 0.2 in the suspension. (10 marks)

The results of a batch settling test are shown in the following table:
Solid concentration, C Superficial particle velocity,
0.05
0.10
0.15
0.20
0.25
0.30
Ups (mm s^-1)
0.023
0.036
0.043
0.046
0.039
0.035
where solid concentration, C, is defined to be (1 - ε) and ε is the voidage of the suspension.
(a) Based on these data, determine the exponent, n, in the Richardson-Zaki correlation and
the single particle terminal velocity, UT, of the particles in the suspension. (15 marks)
(b) Hence, or otherwise, determine the velocity of propagation of a layer of solids with
concentration 0.2 in the suspension. (10 marks)

Added by Rafael Y.

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