Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
668935 | International Journal of Thermal Sciences | 2016 | 5 Pages |
Abstract
For the steady forced convection cooling of an isothermal spherical object in an axially symmetric incompressible fluid flow at high Péclet numbers, where the heat transport occurs mainly in a thin thermal boundary layer near the surface of the object, the relation: Nu∝Pe1/2Nu∝Pe1/2 or Nu∝Pe1/3Nu∝Pe1/3 between the Nusselt number and the Péclet number is generally found. In this paper we investigate for the general case of a 3-dimensional object immersed in a 3-d incompressible fluid flow the connection between these two characteristic numbers and obtain a similar relation: Nu ∝ Pe1/k+2Nu ∝ Pe1/k+2 with integer values k≥0k≥0 , where k depends only on the boundary conditions of the fluid flow field at the surface of the object.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Georg Lohöfer,