Sherwood correlation

Early RPB researchers discovered that this flooding correlation for packed towers applied equally well to RPBs when the gravity term (g) was replaced by centrifugal acceleration (ra>2). As acceleration increases, the gas flooding velocity (Uq) increases in order to maintain the same value of the first term. Since the ratio of liquid (L) to gas (G) flow remains constant, liquid flow increases commensur-ately with gas flow. Most researchers observed higher gas velocities before the onset of flooding than predicted by the Sherwood correlation (17,26,27). 

Equation 6.12 relates CP to flux (/) and the effective mass-transfer coefficient (kes) for retained solute. For a clean membrane keff = k, which is the boundary layer mass-transfer coefficient from Sherwood correlations [45, 46], However, for a membrane... 

Determine the column diameter. The generally accepted design procedures for sizing randomly packed columns are modifications of the Sherwood correlation. A widely applied version is that developed by the Norton Company. It has been adapted slightly for this text to permit its application to low-pressure systems. 

Da Costa et al. [32] showed that the mass transfer coefficient for various net-type spacers can be represented by a Sherwood correlation ... 

Gekas, V. and Hallstrom, B. Mass transfer in the membrane concentration polarization layer under turbulent cross flow I. Critical literature review and adaptation of existing Sherwood correlations to membrane operations, J. Membr. Sci., 30, 153, 1987. 

The Gilliland-Sherwood correlation for gas-phase binary mass transfer in a wetted wall column is... 

In their original development of the linearized theory Toor (1964) and Stewart and Prober (1964) proposed that correlations of the type given by Eqs. 8.8.5 and 8.8.7 could be generalized by replacing the Fick diffusivity D by the charactersitic diffusion coefficients of the multicomponent system that is, by the eigenvalues of the Fick matrix [ >]. The mass transfer coefficient calculated from such a substitution would be a characteristic mass transfer coefficient an eigenvalue of [/c]. For example, the Gilliland-Sherwood correlation (Eq. 8.8.5) would be modified as follows ... 

The Gilliland-Sherwood correlation in the form of Eq. 8.8.12 may be used to estimate... 

To obtain values of k at other concentrations and also for different solutes, the Schmidt-Sherwood correlation for constant Reynold s number was used (29) ... 

Answer For laminar flow adjacent to a solid-liquid interface, the Sherwood correlations for boundary layer mass transfer suggest that 1 = 5 and surface-averaged mass transfer coefficient is... 

The mass-transfer coefficient in Equation 4.18 is calculated from the Sherwood correlation (Ranz and Marshall 1952a,b) ... 

Critical literature review and adaptation of existing Sherwood correlations to... 

The increased mass transfer enhances the flux in two ways, the mass transfer coefficient will increase, and the wall concentration (or polarization modulus) will be lower. The mass transfer coefficient can be obtained from the Sherwood correlations with the following coefficients which Slimed to be rather independent on type of spacer [2,3],... 

Calculate the mass transfer coefficient from the experimental data, assuming that the film model applies, and from the Sherwood correlations. 

Gilliland-Sherwood correlation A dimensionless equation used to determine the mass transfer in gas absorption and relates the Sherwood number, Reynolds number, and Schmidt number ... 

Linton-Sherwood correlation A dimensionless equation used to determine the... 

Gilland-Sherwood correlations were developed for a number of test systems and configurations by a number of investigators. These correlations are listed in Table 15.3. 

Gilland-Sherwood Correlations Reported by Different Investigators... 

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