Height over weir

Capacity factor Figure 10-29 Crest height over weir Eq. M 0-261 Downcomer pressure drop Eq. (10=27)... 

Liquid Height Over Weir how For the purpose of quick calculation, assume weir correction factor = 1. In most cases, is close to one. Applying the Francis... 

Let us assume that the change in inlet height over weir is the same as the change in ouriet height over weir. Then ... 

Figure 8-104. Liquid height over straight weir.

D Diffusion coefficient m2/s ft7s how Height of crest over weir mm in... 

The Smith et al. correlation (20, Fig. 6.11). This is another early entrainment flooding prediction method that has sometimes been recommended (11). Compared to Fair s correlation, the Smith et al. correlation is claimed (20) to be less conservative. It was derived from a small base of field data for sieve, valve, and bubble-cap trays. Similar to Fair s correlation, Smith s correlation uses CSB versus a flow parameter plot, but here the dependence of CSB on the flow parameter is weaker, and there is no surface tension correction factor. CSB and flood 316 both based on the net area AN, and are evaluated from Fig. 6.11 and Eq. (6,9), respectively. The height over the weir, how, is obtained from Eq, (6.49). 

The clear liquid height is equal to the sum of the weir height, the height over the weir, and hah1 the hydraulic gradient, giving... 

Liquid height over the weir. h0U1 is calculated from a corrected Francis weir formula (2-5,18,31). For segmental weirs... 

Height of crest over weir ha, which can be calculated by Eq. (13). 

---