Experimental Study of Temperature Gradient and Slit Wall Effect on the Flow Stability in the Annular Gap

2014 ◽  
Vol 50 (2) ◽  
pp. 207
Author(s):  
Dong LIU
Keyword(s):  
Experimental Study ◽  
Temperature Gradient ◽  
Flow Stability ◽  
Wall Effect ◽  
Annular Gap

scholarly journals Experimental study and numerical simulation of temperature gradient effect for steel-concrete composite bridge deck

2021 ◽  
pp. 002029402110071
Author(s):  
Da Wang ◽  
Benkun Tan ◽  
Xie Wang ◽  
Zhenhao Zhang
Keyword(s):  
Experimental Study ◽  
Thermal Stress ◽  
Temperature Distribution ◽  
Temperature Gradient ◽  
Bridge Deck ◽  
Vertical Temperature ◽  
Extreme Stress ◽  
Gradient Effect ◽  
Composite Bridge ◽  
Composite Bridge Deck

The temperature distribution of the bridge and its thermal effect has always been an important issue for researchers. To investigate the temperature distribution and thermal stress in the steel-concrete composite bridge deck, a 1:4 ratio temperature gradient effect experimental study was carried out in this paper. First, a set of experimental equipment for laboratory temperature gradient loading was designed based on the principle of temperature gradient caused by solar radiation, the temperature gradient obtained from the measurements were compared with the specifications and verified by the FE method. Next, the loading of the steel-concrete composite deck at different temperatures was performed. The thermal stress response and change trend of the simply supported and continuously constrained boundary conditions under different temperature loads were analyzed. The experimental results show that the vertical temperature of steel-concrete composite bridge deck is nonlinear, which is consistent with the temperature gradient trend of specifications. The vertical temperature gradient has a great influence on the steel-concrete composite bridge deck under different constraints, and the extreme stress of concrete slab and steel beam is almost linear with the temperature gradient. Finally, some suggestions for steel-concrete composite deck design were provided based on the research results.

AN EXPERIMENTAL STUDY OF THE FREEZE VALVE OPENING TIME WITH CONSIDERING WALL EFFECT

2019 ◽  
Vol 2019.27 (0) ◽  
pp. 1519
Author(s):  
Tatsuya Tokushima ◽  
Indarta Kuncoro Aji ◽  
Koji Enoki ◽  
Motoyasu Kinoshita ◽  
Tomio Okawa
Keyword(s):  
Experimental Study ◽  
Wall Effect ◽  
Valve Opening

Electromigration in the presence of a temperature gradient: Experimental study and modelling

1988 ◽  
Vol 17 (5) ◽  
pp. 473-478 ◽  
Author(s):  
A. P. Schwarzenberger ◽  
C. A. Ross ◽  
J. E. Evetts ◽  
A. L. Greer
Keyword(s):  
Experimental Study ◽  
Temperature Gradient

The Effect of Temperature Gradient on the Stability of Flow between Vertical, Concentric, Rotating Cylinders

1979 ◽  
Vol 21 (6) ◽  
pp. 403-409 ◽  
Author(s):  
M. M. Sorour ◽  
J. E. R. Coney
Keyword(s):  
Temperature Gradient ◽  
Velocity Ratio ◽  
Axial Flow ◽  
Wave Number ◽  
Taylor Vortex ◽  
Effect Of Temperature ◽  
Neutral Stability ◽  
Radial Temperature ◽  
Annular Gap ◽  
The Stability

The effect of a radial temperature gradient on the hydrodynamic stability in the annular gap formed by two, vertical, concentric cylinders, the inner being rotatable and the outer both stationary and isothermally heated, was studied for the cases of zero and imposed axial fluid flow in the annular gap. For zero axial flow, it was found that the temperature gradient destabilizes the flow while not affecting the form of the secondary flow, viz. the classic Taylor vortex. For imposed axial flow, the point of neutral stability was modified only when natural convection was strong enough to affect the parabolic velocity profile associated with that flow; the extent of this modification was shown to depend on the direction of the axial flow. Also, the longitudinal temperature gradients within the gap were found to influence the axial wave number and the drift-velocity ratio.

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