This study used particle swarm optimization (PSO) to determine the optimal values of effective design variables acting on the stress distribution around a quasi-triangular hole in an infinite orthotropic plate. These parameters were load angle, hole orientation, bluntness, fiber angle, and material properties, which were ascertained on the basis of an analytical method used by Lekhnitskii [3]. ...

Direct numerical simulation with up to 10×109 scale grid points based on graphics processing unit computation is carried out investigate the bluntness effect hypersonic boundary-layer transition over a slender cone zero angle of attack at Mach 6. Four cases nose radii 1, 10, 20, and 40 mm are conducted, corresponding Reynolds number radius varies from 1.0×104 4.0×105. Random disturbances broad ...

Unsteady vortex shedding at a trailing edge may cause pressure fluctuations and strong tonal noise which can have important consequences to the performance of marine and aeronautical type lifting surfaces. This paper presents data from unsteady RANS simulation of high Reynolds number trailing edge flow. It aims to identify and quantify dominant features of the trailing edge flow field over a tw...

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Twenty years ago Breiman (2001) called to our attention a significant cultural division in modeling and data analysis between the stochastic models algorithmic models. Out of his deep concern that statistical community was so deeply almost exclusively committed former, warned we were losing abilities solve many real-world problems. not first, certainly only statistician, sound alarm; may refer ...

Blood is modeled as a suspension of red blood cells using the dissipative particle dynamics method. The red blood cell membrane is coarse-grained for efficient simulations of multiple cells, yet accurately describes its viscoelastic properties. Blood flow in microtubes ranging from 10 to 40 μm in diameter is simulated in three dimensions for values of hematocrit in the range of 0.15-0.45 and ca...

In the Present paper effect of angle of incidence on pitching derivatives of a delta wing with Straight leading edges for attached shock case in Supersonic Flow has been studied. A Strip theory is used in which strips at different span wise location are independent. This combines with similitude to give a piston theory. From the results it is seen that with the increase in the Mach number, ther...

Effect of air cushion layer right before impact of a rigid body onto water surface has been investigated in this paper. The study is mainly focused on evaluation of cushioning pressure and the resulting free surface elevation. The air flow is assumed to be an irrotational flow which is governed by Laplace equation. The air problem and the resulting response of the water free surface are suppose...

Receptivity and stability of supersonic boundary layers over blunt flat plates and wedges are numerically investigated at a free stream Mach number of 3.5 and at a high Reynolds number of 10/inch. Both the steady and unsteady solutions are obtained by solving the full Navier-Stokes equations using the 5-order accurate weighted essentially non-oscillatory (WENO) scheme for space discretization a...