scholarly journals Superfluid turbulence in a nonuniform circular channel

1993 ◽  
Vol 92 (5-6) ◽  
pp. 307-334 ◽  
Author(s):  
P. J. Murphy ◽  
J. Castiglione ◽  
J. T. Tough
Keyword(s):  
Circular Channel ◽  
Superfluid Turbulence

SELF-PRESERVING STRUCTURES IN HOMOGENEOUS SUPERFLUID TURBULENCE

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-158-C6-159
Author(s):  
J. T. Tough ◽  
D. R. Ladner ◽  
C. Piotrowski
Keyword(s):  
Superfluid Turbulence

Gross–Pitaevskii dynamics of Bose–Einstein condensates and superfluid turbulence

2003 ◽  
Vol 33 (5-6) ◽  
pp. 509-544 ◽  
Author(s):  
M Abid ◽  
C Huepe ◽  
S Metens ◽  
C Nore ◽  
C T Pham ◽  
...  
Keyword(s):  
Superfluid Turbulence ◽  
Bose Einstein

scholarly journals Superfluid Turbulence from Quantum Kelvin Wave to Classical Kolmogorov Cascades

2009 ◽  
Vol 103 (8) ◽  
Author(s):  
Jeffrey Yepez ◽  
George Vahala ◽  
Linda Vahala ◽  
Min Soe
Keyword(s):  
Kelvin Wave ◽  
Superfluid Turbulence

Discussion of “Brink Depth for a Circular Channel”

1963 ◽  
Vol 89 (3) ◽  
pp. 389-405
Author(s):  
R. M. Advani ◽  
Praxitelis A. Argyropoulos ◽  
N. Rajaratnam ◽  
D. Muralidhar ◽  
John K. Vennard
Keyword(s):  
Circular Channel ◽  
Brink Depth

scholarly journals Inhomogeneous vortex tangles in counterflow superfluid turbulence: flow in convergent channels

2016 ◽  
Vol 7 (2) ◽  
pp. 130-149 ◽  
Author(s):  
Lidia Saluto ◽  
Maria Stella Mongioví
Keyword(s):  
Evolution Equation ◽  
Dimensional Analysis ◽  
Unit Volume ◽  
Vortex Formation ◽  
Second Order ◽  
Line Density ◽  
Superfluid Turbulence ◽  
Turbulence Flow ◽  
Vortex Diffusion

Abstract We investigate the evolution equation for the average vortex length per unit volume L of superfluid turbulence in inhomogeneous flows. Inhomogeneities in line density L andincounterflowvelocity V may contribute to vortex diffusion, vortex formation and vortex destruction. We explore two different families of contributions: those arising from asecondorder expansionofthe Vinenequationitself, andthose whichare notrelated to the original Vinen equation but must be stated by adding to it second-order terms obtained from dimensional analysis or other physical arguments.

scholarly journals Classical and quantum regimes of superfluid turbulence

JETP Letters ◽  
2003 ◽  
Vol 78 (9) ◽  
pp. 533-537 ◽  
Author(s):  
G. E. Volovik
Keyword(s):  
Superfluid Turbulence

scholarly journals Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8593
Author(s):  
Muneerah Al Nuwairan ◽  
Basma Souayeh
Keyword(s):  
Heat Transfer ◽  
Thermal Performance ◽  
Working Fluid ◽  
Solar Air Heater ◽  
Circular Channel ◽  
Maximum Enhancement ◽  
Performance Factor ◽  
Thermal Performance Factor ◽  
Sst Model ◽  
Inlet Length

This numerical investigation presents the effects of the position of baffles in the shape of a circle’s segment placed inside a circular channel to improve the thermal and flow performance of a solar air heater. Three different baffles’ positions with Reynolds number varying between 10,000 to 50,000 were investigated computationally. The k-omega SST model was used for solving the governing equations. Air was taken as the working fluid. Three pitch ratios (Y = 3, 4, and 5) were considered, while the height of the baffles remained fixed. The result showed an enhancement in Nusselt number, friction factor, j-factor, and thermal performance factor. Staggered exit-length baffles showed maximum enhancement in heat transfer and pressure drop, while inline inlet-length baffles showed the least enhancement. For a pitch ratio of Y = 3.0, the enhancement in all parameters was the highest, while for Y = 5.0, the enhancement in all parameters was the least. The highest thermal performance factor of 1.6 was found for SEL at Y = 3.0.

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