TEMPERATURE GRADIENTS IN TURBULENT GAS STREAMS. POINT VALUES OF EDDY CONDUCTIVITY AND VISCOSITY.IN UNIFORM FLOW BETWEEN PARALLEL PLATES

1952 ◽  
Vol 44 (2) ◽  
pp. 424-430 ◽  
Author(s):  
F. Page ◽  
W. G. Schlinger ◽  
D. K. Breaux ◽  
B. H. Sage
Keyword(s):  
Uniform Flow ◽  
Temperature Gradients ◽  
Parallel Plates ◽  
Gas Streams

TEMPERATURE GRADIENTS IN TURBULENT GAS STREAMS. METHODS AND APPARATUS FOR FLOW BETWEEN PARALLEL PLATES

1952 ◽  
Vol 44 (2) ◽  
pp. 410-419 ◽  
Author(s):  
W. H. Corcoran ◽  
F. Page ◽  
W. G. Schlinger ◽  
B. H. Sage
Keyword(s):  
Temperature Gradients ◽  
Parallel Plates ◽  
Gas Streams

Temperature Gradients in Turbulent Gas Streams - Recovery Factors in Steady, Uniform Flow

1955 ◽  
Vol 47 (6) ◽  
pp. 1243-1248
Author(s):  
J. B. Opfell ◽  
Kazuhiko Sato ◽  
B. H. Sage
Keyword(s):  
Uniform Flow ◽  
Temperature Gradients ◽  
Gas Streams

Temperature Gradients in Turbulent Gas Streams - Behavior Near Boundary in Two Dimensional Flow.

1953 ◽  
Vol 45 (10) ◽  
pp. 2139-2145 ◽  
Author(s):  
S. D. Cavers ◽  
N. T. Hsu ◽  
W. G. Schlinger ◽  
B. H. Sage
Keyword(s):  
Temperature Gradients ◽  
Two Dimensional ◽  
Gas Streams ◽  
Dimensional Flow ◽  
Two Dimensional Flow

Flexible Flapping Dynamics of Parallel Elastic Plates in a Uniform Flow: Application to Energy Harvesting Devices

2014 ◽  
Author(s):  
Pardha S. Gurugubelli ◽  
Rajeev K. Jaiman ◽  
Boo Cheong Khoo
Keyword(s):  
Coupled System ◽  
Uniform Flow ◽  
Net Energy ◽  
Elastic Plates ◽  
Parallel Plates ◽  
Mass Ratio ◽  
Bending Rigidity ◽  
Fluid Structure ◽  
Flapping Motion ◽  
Wide Range

A new high-order finite element Coupled Field with Explicit Interface (CFEI) code has been developed for simulating flapping motion of a thin flexible body in a uniform flow with strong add-mass effects. In the first part, we study the flapping dynamics of a single cantilevered plate for wide range of mass ratios and maintaining relatively low bending rigidity through our direct fluid-structure simulations. As a function of mass-ratio, the flapping dynamics reveals three distinct regimes: (i) fixed-point stable; (ii) limit-cycle flapping; and (iii) chaotic flapping. The changes associated with regime transition with increasing mass ratio are analyzed by vortex wake patterns and tip-displacement responses. Dependencies of stability predicted by the theoretical analysis are confirmed by the nonlinear fluid-structure simulations. In the second part, two parallel cantilevered plates will be investigated as a function of spacing between the parallel plates to assess the flapping motion and the net energy transfer. The flow-induced vibrations of this kind of coupled system have a potential to extract energy from the surrounding fluid flow for generation of electric power.

scholarly journals Force-enhancing vortex equilibria for two parallel plates in uniform flow

2012 ◽  
Vol 468 (2140) ◽  
pp. 1175-1195 ◽  
Author(s):  
Takashi Sakajo
Keyword(s):  
Stationary Point ◽  
Design Problem ◽  
Flow Problem ◽  
Point Vortex ◽  
Uniform Flow ◽  
Point Vortices ◽  
Multiply Connected Domains ◽  
Parallel Plates ◽  
Single Plate ◽  
Point Vortex Equilibria

A two-dimensional potential flow in an unbounded domain with two parallel plates is considered. We examine whether two free point vortices can be trapped near the two plates in the presence of a uniform flow and observe whether these stationary point vortices enhance the force on the plates. The present study is an extension of previously published work in which a free point vortex over a single plate is investigated. The flow problem is motivated by an airfoil design problem for the double wings. Moreover, it also contributes to a design problem for an efficient wind turbine with vertical blades. In order to obtain the point-vortex equilibria numerically, we make use of a linear algebraic algorithm combined with a stochastic process, called the Brownian ratchet scheme. The ratchet scheme allows us to capture a family of stationary point vortices in multiply connected domains with ease. As a result, we find that stationary point vortices exist around the two plates and they enhance the downward force and the counter-clockwise rotational force acting on the two plates.

Temperature Gradients in Turbulent Gas Streams

1953 ◽  
Vol 45 (3) ◽  
pp. 662-666 ◽  
Author(s):  
W. G. Schlinger ◽  
V. J. Berry ◽  
J. L. Mason ◽  
B. H. Sage
Keyword(s):  
Temperature Gradients ◽  
Gas Streams
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