An Experimental and Numerical Study of Diesel Spray Impingement on a Flat Plate

2017 ◽  
Vol 10 (2) ◽  
pp. 407-422 ◽  
Author(s):  
Le Zhao ◽  
Roberto Torelli ◽  
Xiucheng Zhu ◽  
Riccardo Scarcelli ◽  
Sibendu Som ◽  
...  
Keyword(s):  
Flat Plate ◽  
Numerical Study ◽  
Diesel Spray ◽  
Spray Impingement

Numerical Study of Boundary Layers With Reverse Wedge Flows Over a Semi-Infinite Flat Plate

2009 ◽  
Vol 77 (2) ◽  
Author(s):  
R. Ahmad ◽  
K. Naeem ◽  
Waqar Ahmed Khan
Keyword(s):  
Boundary Layer ◽  
Flat Plate ◽  
Numerical Study ◽  
Boundary Layer Equation ◽  
Wedge Angle ◽  
Adverse Pressure Gradient ◽  
Problem Solution ◽  
Weighted Residual Method ◽  
Boundary Layer Problem ◽  
Layer Problem

This paper presents the classical approximation scheme to investigate the velocity profile associated with the Falkner–Skan boundary-layer problem. Solution of the boundary-layer equation is obtained for a model problem in which the flow field contains a substantial region of strongly reversed flow. The problem investigates the flow of a viscous liquid past a semi-infinite flat plate against an adverse pressure gradient. Optimized results for the dimensionless velocity profiles of reverse wedge flow are presented graphically for different values of wedge angle parameter β taken from 0≤β≤2.5. Weighted residual method (WRM) is used for determining the solution of nonlinear boundary-layer problem. Finally, for β=0 the results of WRM are compared with the results of homotopy perturbation method.

NUMERICAL STUDY OF THE DISTURBANCES GENERATED BY MICROJETS IN A SUPERSONIC FLAT PLATE BOUNDARY LAYER

2021 ◽  
Author(s):  
Andrei Valerievich Novikov ◽  
Alexander Vitalievich Fedorov ◽  
Ivan Vladimirovich Egorov ◽  
Anton Olegovich Obraz ◽  
Nikolay Nikolaevich Semenov
Keyword(s):  
Boundary Layer ◽  
Flat Plate ◽  
Numerical Study ◽  
Plate Boundary ◽  
Flat Plate Boundary Layer

Experimental and Numerical Study of Flat Plate Sludge Drying at Low Temperature by Convection and Direct Conduction

2014 ◽  
Vol 32 (14) ◽  
pp. 1664-1674 ◽  
Author(s):  
S. Louarn ◽  
J.-P. Ploteau ◽  
P. Glouannec ◽  
H. Noel
Keyword(s):  
Low Temperature ◽  
Flat Plate ◽  
Numerical Study ◽  
Sludge Drying

Numerical Study of Nanosecond Pulsed Plasma Actuator in Laminar Flat Plate Boundary Layer

2016 ◽  
Vol 20 (5) ◽  
pp. 1424-1442 ◽  
Author(s):  
J. G. Zheng ◽  
J. Li ◽  
Z. J. Zhao ◽  
Y. D. Cui ◽  
B. C. Khoo
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Flat Plate ◽  
Numerical Study ◽  
Wave Train ◽  
Plate Boundary ◽  
Flow Separation Control ◽  
Strong Control ◽  
Flat Plate Boundary Layer ◽  
Residual Heat

AbstractNanosecond (ns) pulsed dielectric barrier discharge (DBD) actuator in a laminar flat plate boundary layer is investigated numerically in an attempt to gain some new insights into the understanding of ns DBD actuation mechanism. Special emphasis is put on the examination, separation and comparison of behaviors of discharge induced micro shock wave and residual heat as well as on the investigation of response of external flow to the two effects. The shock wave is found to introduce highly transient, localized perturbation to the flow and be able to significantly alter the flow pattern shortly after its initiation. The main flow tends to quickly recover to close to its undisturbed state due to the transient nature of perturbation. However, with the shock decay and final disappearance, another perturbation source in the vicinity of discharge region, which contains contribution from both residual heat and shock, becomes increasingly pronounced and eventually develops into a perturbation wave train in the boundary layer. The perturbation is relatively weak and may not be a Tollmien-Schlichting (TS) wave and not trigger the laminar-turbulent transition of boundary layer. Instead, it is more likely to manipulate the flow stability to achieve the strong control authority of this kind of actuation in the case of flow separation control. In addition, a parametric study over the different electrical and hydrodynamic parameters is also conducted.

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