Mixed Convection Plumes Arising from a Thermal Point Source


The temperature and velocity distributions of an axisymmetric plume are presented for fluids having Prandtl numbers of 0. 7, 7, 50, and 100. The entire mixed convection regime from pure free to pure forced convection was covered by utilizing only one set of nonsimilarity variables. The centerline velocity and the centerline temperature increase but the plume radii decrease as the Prandtl number increases and as the mixed convection parameter decreases. The entrainment velocity increases as the Prandtl number or the mixed convection parameter decreases. Mixed convection region for this plume can be specified as the region where 0. 2 less than equivalent to xi less than equivalent to 0. 65. Outside that region, either the pure free or the pure forced convection analysis can be used to estimate the centerline velocity and temperature. Comparison of the present results with the limited range of previously published results for this plume provides a very good agreement.


Mechanical and Aerospace Engineering

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


File Type





© 1985 American Society of Mechanical Engineers (ASME), All rights reserved.

Publication Date

01 Jan 1985