Heat and mass transfer in pressure-gradient boundary layers
Dimensional analysis and the asymptotic expansion method are used to investigate the structure of a scalar field in moving-equilibrium boundary layers with longitudinal pressure gradients. The available experimental data on temperature profiles in decelerating wall flows make it possible to determin...
Gespeichert in:
Veröffentlicht in: | International journal of heat and mass transfer 1991-11, Vol.34 (11), p.2837-2857 |
---|---|
1. Verfasser: | |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Dimensional analysis and the asymptotic expansion method are used to investigate the structure of a scalar field in moving-equilibrium boundary layers with longitudinal pressure gradients. The available experimental data on temperature profiles in decelerating wall flows make it possible to determine universal constants and functions entering into the theoretical relationships and to obtain interpolation formulas describing the mean temperature field. Assuming that an overlap layer exists, where both the defect law and gradient-sublayer law are valid, the universal heat and mass transfer law can be obtained. The numerical coefficients of this law are estimated for decelerating pressure-gradient flows. The forms of some statistical characteristics of temperature fluctuations in the gradient sublayer are found by dimensional analysis and compared with the available experimental data. (P.D.) |
---|---|
ISSN: | 0017-9310 1879-2189 |
DOI: | 10.1016/0017-9310(91)90245-A |