Effect Of Liquid Flow Rate Research Articles

THE SIGNIFICANCE OF END-EFFECTS ON THE MEASUREMENT OF MASS TRANSFER TO A FLOWING LIQUID ON AN INCLINED PLANE

The nature of the hydrodynamic flow of water down an inclined plane in the presence of static gas is discussed. The effects of liquid flow rates and angles of inclination of the plane on the film thickness and ripple inception are recorded. The ripples differ in number and character from those usually associated with liquid flow on a vertical wall Mass transfer of carbon dioxide into a water film on an inclined plane is determined more accurately than hitherto by introduction of modifications to the apparatus and the use of novel methods for determining end-effects. This makes possible more meaningful comparisions between experimental results and model theory. Penetration concentration profiles in the falling liquid film are presented

Performance of a membrane-type enzyme reactor utilizing ultrafiltration.

For hydrolysis of amylose by β-amylase the effects of liquid flow rate, ultrafiltration flux and tube radius on the performance of a membrane reactor of two coaxial tubes were studied. The efficiency of separation of the product from the reacting stream in this reactor was improved by use of a small radius tube and by operation at a high ultrafiltration flux. The calculated results of the product concentration showed general agreement with the experimental results obtained with the membrane reactor.

Studies on gas hold-up in gas-liquid spouted vessel.

In a gas-liquid spouted vessel, where power is supplied from a pump to water and gas is introduced at a nozzle attached at the bottom of the vessel, gas bubbles are finely broken at the nozzle and dispersed to the vessel. Gas hold-up in the gas-liquid spouted vessel rapidly increases with increasing liquid flow rate and easily exceeds twice the gas hold-up in the aerated tower of the same gas flow rate with no liquid flow, though co-current liquid flow gives zero or negative effect on gas hold-up in the aerated tower. Effect of liquid flow rate, gas flow rate, nozzle to vessel diameter ratio and nozzle length one ffective spouting of gas bubbles were studied experimentally. Ways are also considered to scale up the gas-liquid spouted vessel.

Liquid distribution in a packed column

The effects of liquid flow rate, packing size, surface tension and viscosity of irrigation liquid on the liquid spread factor are studied, and the values of the liquid spread factor are correlated for a wide range of packing size. The distribution of the liquid in a packed column is predicted by using a diffusional model with a new boundary condition. The boundary condition at the wall is based on the assumption that the penetration of the liquid into the wall takes place by the similar mechanism to the transport phenomena considering the dependence of the equilibrium wall flow rate on the liquid flow rate. The experimental results agree well with the theoretical ones for pure water and the surfactant solution.