Thermohydraulics of laminar flow through a circular tube having integral helical rib roughness and fitted with centre-cleared twisted-tape

2012 ◽  
Vol 42 ◽  
pp. 154-162 ◽  
Author(s):  
Suvanjan Bhattacharyya ◽  
Sujoy Kumar Saha
Keyword(s):  
Laminar Flow ◽  
Circular Tube ◽  
Twisted Tape ◽  
Flow Through

Constrained Direct Optimisation of the Geometrical Parameters of a Twisted-Tape for Laminar Flow in a Circular Tube

2021 ◽  
pp. 1-17
Author(s):  
Luís G. Silva Junior ◽  
Felipe A. S. Silva ◽  
Tiago G. Faria ◽  
Martin P. Kessler ◽  
Leandro O. Salviano
Keyword(s):  
Laminar Flow ◽  
Circular Tube ◽  
Geometrical Parameters ◽  
Twisted Tape

Dispersion of matter in non-Newtonian laminar flow through a circular tube

1966 ◽  
Vol 292 (1429) ◽  
pp. 203-208 ◽  
Keyword(s):  
Laminar Flow ◽  
Newtonian Fluid ◽  
Circular Tube ◽  
Newtonian Fluids ◽  
Parallel Plane ◽  
Bingham Plastic ◽  
Ellis Model ◽  
Model Fluid ◽  
Flow Through

Taylor’s analyses of the dispersion of Newtonian fluids in laminar flow in a circular tube are extended to the flow of the Bingham plastic and Ellis model fluid. The previous results for the Newtonian fluid and power-low fluid can be deduced from the results of this work. It is indicated that Aris’s modification of Taylor’s analyses can be naturally applied to the non-Newtonian fluid. Results obtained for laminar flow between two parallel plane walls are given in the appendix.

Hot-Wire Measurements of Turbulence Correlations in a Triangular Duct

1962 ◽  
Vol 29 (4) ◽  
pp. 609-614 ◽  
Author(s):  
C. J. Cremers ◽  
E. R. G. Eckert
Keyword(s):  
Heat Transfer ◽  
Laminar Flow ◽  
Cross Section ◽  
Circular Tube ◽  
Turbulent Transport ◽  
Circular Cross Section ◽  
Hot Wire ◽  
Round Tube ◽  
Flow Through ◽  
Hot Wires

Previous studies by flow visualization have indicated that the flow through a duct of triangular cross section is in its characteristics quite different from flow through a duct with circular cross section. They revealed among others that purely laminar flow exists in the corners of the duct even though the bulk of the fluid moves in turbulent motion. Heat-transfer measurements in such a duct appear to indicate that the turbulent transport in the direction of the height of the duct is considerably smaller than expected from circular tube measurements. The present paper reports the measurements of turbulent correlations for turbulent flow through such a duct. These measurements have been made with hot wires of very small dimensions. They again reveal the existence of a laminar corner region. In the bulk of the fluid, the differences of the correlations to those in a round tube turned out to be smaller than originally suspected.

A numerical solution for the dispersion in laminar flow through a circular tube

1990 ◽  
Vol 68 (2) ◽  
pp. 191-196 ◽  
Author(s):  
Teruo Takahashi ◽  
Takashi Korenaga ◽  
Fenghua Shen
Keyword(s):  
Laminar Flow ◽  
Numerical Solution ◽  
Circular Tube ◽  
Flow Through
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