ISSN:0001-1541    

DOI:10.1002/aic.690090502

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

摘要:

AbstractThe prediction of vapor‐liquid equilibria with the Benedict‐Webb‐Rubin (BWR) equation of state has been restudied. It was found that the suitability of the equation of state to represent fully the behavior of the constituents is the main factor which affects the accuracy of the prediction. To improve the representation of the pure component data by means of equation of state it is necessary to modify the present form of the BWR equation of state. A tentative form of modification of the BWR equation of state has been chosen. Although the modified equation is still subject to further evaluation and refinement, satisfactory results have been obtained for the prediction of four binary systems containing nitrogen and carbon dioxide (nitrogen‐methane. methane‐carbon dioxide, propane‐carbon dioxide, and n‐butane‐carbon dioxide).The method of nonlinear estimation has been used to fit the coefficients in the equation of state to either vapor‐pressure d

ISSN:0001-1541    

DOI:10.1002/aic.690090503

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

摘要:

AbstractAn approximate solution to the problem of freezing of an isotropic, semi‐infinite slab is proposed for the situation where Newton's cooling at the surface of the slab applies. Comparison with the existing exact solution shows the approximate solution to be practical.The heat‐balance integral method is used with the assumptionof linear temperature distribution in the frozen zone and of a parabolic temperature profile in the liquid zone. The final expression for the depth of solidification, however, seems to be only little affected by the particular temperature profiles cho

ISSN:0001-1541    

DOI:10.1002/aic.690090504

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690090505

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690090506

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690090507

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

摘要:

AbstractThe time‐dependent behavior of Newtonian oscillating manometers was studied experimentally and mathematically. The manometers were simulated by numerically integrating the axial component of the equation of motion in cylindrical coordinates. Modifications in the driving‐force term were made to include end effects of surface tension and flow reversal. The integrations showed that the velocity profiles in the manometer were not parabolic and contained many maxima and minima, particularly when the fluid had a low viscosity. Good agreement was obtained between experimental and simulation frequencies and damping fact

ISSN:0001-1541    

DOI:10.1002/aic.690090508

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690090509

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690090510

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY

摘要:

AbstractLaminar‐flow heat transfer in a cylindrical tube was studied experimentally in order to test a recent analytical method of predicting temperature profiles (1). The experimental equipment was designed to measure wall temperatures to better than 0.1°C. and to utilize small radial heat fluxes so as to minimize effects of natural convection.A series of experiments was carried out on five different types of prescribed wall heat flux with water flowing in a vertical tube. The measured wall temperatures in these experiments compared well with those predicted by the theoretical solution. Small deviations which did exist were explained in terms of experimental errors.The agreement found indicates that the analytical method may be safely used in the study of experimental data in such heat transfer and analogous mass transfer proble

ISSN:0001-1541    

DOI:10.1002/aic.690090511

出版商:American Institute of Chemical Engineers    

年代:1963

数据来源: WILEY