Auroba. Nafaa. Abdullah
Abstract
Experimental study of gas holdup (Eg), bubble diameter (dvs) interfacial area(a) m-1, small bubble rise velocity (Ubs), and bubble rise velocity (Ubr) in (0.1mi.d) and (1.5m) high column ...
Read More ...
Experimental study of gas holdup (Eg), bubble diameter (dvs) interfacial area(a) m-1, small bubble rise velocity (Ubs), and bubble rise velocity (Ubr) in (0.1mi.d) and (1.5m) high column operated at ambient temperature and pressureconditions. The superficial gas velocity (Ug) was varied in the range of (0-0.3)m/s, spanning both the homogenous and heterogeneous flow regimes. Air wasused as the gas phase.Different liquids were used as liquid phase (Water, Ethanol, Butanol, paraffinoil solutions ).Experimental results shows that the influence of liquid properties on (Eg) isconsiderable, where the lower surface tension (s ) gives a lower (Ubr) andtherefore a higher (Eg). High viscosity (mL) leads to large bubbles andtherefore a low (Eg) and (a) , for coalescence liquids bubble diameter increaseswith increasing gas velocity.A correlation based on dimensionless groups for the predicition of (Eg) liquidproperties is proposed, and found to be in good agreement with theexperimental data
