摘要:

AbstractHeat transfer from a column wall to water spouted sand beds was studied in a 9 in. diam. steel column. The heat transfer rate to water flowing through a spouted bed was lower than when the column was empty. The presence of a bed suppressed convection currents, causing a large temperature gradient from the wall to the centre of the bed, and consequently a lowered heat transfer rate. At the same water flow rate, the spouted bed gave a lower rate than a fixed bed, because a large fraction of the water bypassed the wall region and flowed up the spout.

ISSN:0008-4034    

DOI:10.1002/cjce.5450370601

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractThe evaporation of a liquid from a wetted surface into a gas stream has consequences which are of fundamental importance in the analysis of sensible heat transfer at the boundary. The presence of a relatively high concentration of vapor in the region adjacent to the surface influences the physical properties of the fluid and the vapor concentration gradient affects the heat transfer mechanism.Experimental equipment was devised to measure the sensible heat transfer coefficients at the inside surface of a porous ceramic tube from which water was being evaporated. Series of tests were carried out for non‐adiabatic wall conditions over ranges of the Reynolds Number from 5,600 to 16,000, tube diameter from 1.360 to 3.300 inches, bulk air temperature from 150 to 220°., and wall vapor pressures from 0.35 to 2.20 p.s.i.a.Over the range of vapor pressures and evaporation rates investigated, the sensible heat transfer coefficients were not observed to depart significantly from those predicted by generally accepted relationships for the dry wall ca

ISSN:0008-4034    

DOI:10.1002/cjce.5450370602

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractThe phase behavior of the carbon dioxide‐hydrogen sulphide‐methane system, previously reported at a temperature of 100°.F.(1), has been investigated at pressures of 400, 1000, and 1600 lb./in.2abs. at 40°F. and at pressures of 1000, 1330 and 1600 lb./in.2abs. at 160°F. Correlation of the experimental data is based upon equilibrium ratios calculated for the individual components, Equilibrium ratios were found to be a function of system composition, temperature, and pressure. Deviation of the liquid phase from ideal solution behavior, as indicated by calculated activity coefficient ratios, is, in general, most dependent upon system composition at the higher pressures and lower temper

ISSN:0008-4034    

DOI:10.1002/cjce.5450370603

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractA special case of liquid‐liquid extraction as been considered where the solute on absorption reacts to form a dimer through a rapid second order reversible reaction with the solvent.If dimer and monomer have different diffusivities (in the same solvent) the rate of absorption becomes dependent on the ratio of these diffusivities and the isotherm governing the “association” reaction.The non linear differential equation governing the absorption was solved numerically with the aid of a digital computer for the case of resistance in one phase only.Correlations based on these solutions were then used in formulating a rate equation. Methods were suggested for the determination of the quantities occurring in the “driving force” of the predicted rate

ISSN:0008-4034    

DOI:10.1002/cjce.5450370604

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY

摘要:

AbstractAn analysis of the extensive literature on non‐steady drag forces supports the correlation of the data by means of a total drag coefficient, which appears to be a function of the Reynolds Number and of a reduced time parameter which is related to the number of particle diameters traversed since the initiation of the motion. The added mass concept is shown to be both completely inadequate and theoretically unsound. An increase in wake turbulence resulting from Reynolds Number increases or from the occurrence of surface roughness seems to diminish the acceleration effects.Fundamental studies of the flow fields around blunt bodies reveal the extreme complexity of the phenomena occurring during acceleration. Explanations offered for the characteristics of the non‐steady drag coefficient behavior re shown to be frequently at variances with these findi

ISSN:0008-4034    

DOI:10.1002/cjce.5450370605

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1959

数据来源: WILEY