EVALUATION OF THE RELAXATION-TIME OF HEAT AND MASS-EXCHANGE IN THE LIQUID-VAPOR BUBBLE FLOW

Citation
Z. Bilicki et al., EVALUATION OF THE RELAXATION-TIME OF HEAT AND MASS-EXCHANGE IN THE LIQUID-VAPOR BUBBLE FLOW, International journal of heat and mass transfer, 39(4), 1996, pp. 753-759
Citations number
10
Categorie Soggetti
Mechanics,"Engineering, Mechanical",Thermodynamics
ISSN journal
00179310
Volume
39
Issue
4
Year of publication
1996
Pages
753 - 759
Database
ISI
SICI code
0017-9310(1996)39:4<753:EOTROH>2.0.ZU;2-7
Abstract
The paper presents a method of evaluation of a time constant that desc ribes relaxational heat exchange between vapour bubbles and superheate d liquid. The Scriven equation of bubble growth solved in a numerical way is used to determine the temperature field in the surroundings of the growing bubble. However, initial and boundary conditions are diffe rent from those studied before. The heat transfer relaxation time is d etermined from variations of the average temperature of the superheate d liquid surrounding the bubble. Calculations are performed in both Eu ler's and Lagrange's descriptions. The relaxation time obtained in the present paper is compared with the relaxation time reevaluated from t he Moby Dick experiment by means of the homogeneous relaxation model.