A generalization of a previous treatment for dissipative systems is suggested which allows a variational integral to be formulated for any set of coupled differential equations which are to be solved simultaneously. This is illustrated for a coupled solution of the equations of motion and energy for
A widely applicable type of variational integral—II: Newtonian flow past a sphere
✍ Scribed by R.W. Flumerfelt; J.C. Slattery
- Publisher
- Elsevier Science
- Year
- 1965
- Tongue
- English
- Weight
- 575 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
The auxiliary variational method presented in the previous paper is applied to the solution of the steady-state flow of an incompressible Newtonian fluid past a sphere. The variational method is used to evaluate unknown coefficients in an initially postulated stream function. A number of solutions, each containing a different number of unknown coefficients in the initially assumed stream function, are obtained; results are presented as drag coefficients. The approximate solutions obtained here demonstrate the feasibility of this method applied to two-and three-dimensional flow problems in which inertial effects must be considered. It is shown that this approach compares favorably with previously described methods.
📜 SIMILAR VOLUMES
## Abstract A combination of Happel's free surface model and variational principles is used to obtain bounds on the drag offered by the creeping flow of a power law fluid past an assemblage of solid spheres. The theoretical predictions of the product of the Fanning friction factor ƒ and Reynolds nu