Development of hydrodynamic instability in film condensation on a cylindrical tube in weightlessness
β Scribed by V. S. Ajaev; S. G. Cherkasov
- Book ID
- 105452325
- Publisher
- Springer
- Year
- 1995
- Tongue
- English
- Weight
- 271 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0015-4628
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π SIMILAR VOLUMES
Hydrodynamic characteristics of liquid films in downward motion on the outer surface of fluted tubes have been inuestigated theoretically. Velocity distribution, volumetric flow rate and friction factor are calculated from the solution of the equation of motion using bi-polar coordinate system. The
It is an investigation into turbulent film condensation on a horizontal tube. In order to forecast the results more exactly, a new theory model of local film shear stress (Ο / Ο w ) is presented in the paper. In the study, four models of different eddy diffusivity are considered. The numerical calcu
Helium was condensed on the wall of a vertical copper tube (14 mm in diameter, 32 mm long) in the experimental range: vapour temperature in the tube -4. 1-5.0 K; heat flux -0.5-86 mW cm-2; temperature differences across a liquid film -0.01-1.3 K; film Reynolds numbers -3-380. It was found that the h