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Full-Text Articles in Engineering
Boundary Singularity Method For Stokes Flow Of Droplet-Fiber Interation, M. Mikhaylenko, Alex Povitsky
Boundary Singularity Method For Stokes Flow Of Droplet-Fiber Interation, M. Mikhaylenko, Alex Povitsky
Dr. Alex Povitsky
No abstract provided.
Hybrid Continuum-Molecular Modeling Of Fibrous Filtration Flows In The Transition Flow Regime, Shunliu Zhao, Alex Povitsky
Hybrid Continuum-Molecular Modeling Of Fibrous Filtration Flows In The Transition Flow Regime, Shunliu Zhao, Alex Povitsky
Dr. Alex Povitsky
No abstract provided.
Regarding Benchmark Case Of A Fully 3d Flow In A Cubic Cavity Driven By The Lid Moving At 45 Degrees, Alex Povitsky
Regarding Benchmark Case Of A Fully 3d Flow In A Cubic Cavity Driven By The Lid Moving At 45 Degrees, Alex Povitsky
Dr. Alex Povitsky
No abstract provided.
Coupled Continuum And Molecular Model Of Flow Through Fibrous Filter, Shunliu Zhao, Alex Povitsky
Coupled Continuum And Molecular Model Of Flow Through Fibrous Filter, Shunliu Zhao, Alex Povitsky
Dr. Alex Povitsky
A coupled approach combining the continuum boundary singularity method (BSM) and the molecular direct simulation Monte Carlo (DSMC) is developed and validated using Taylor-Couette flow and the flow about a single fiber confined between two parallel walls. In the proposed approach, the DSMC is applied to an annular region enclosing the fiber and the BSM is employed in the entire flow domain. The parameters used in the DSMC and the coupling procedure, such as the number of simulated particles, the cell size, and the size of the coupling zone are determined by inspecting the accuracy of pressure drop obtained for …
Far-Field Induced Drag Prediction Using Vorticity Confinement Technique, Troy Snyder, Alex Povitsky
Far-Field Induced Drag Prediction Using Vorticity Confinement Technique, Troy Snyder, Alex Povitsky
Dr. Alex Povitsky
The goal of this study is to show the efficiency of the wake-integral technique coupled with vorticity confinement method for the prediction of induced drag by inviscid numerical modeling. While the vorticity confinement method has previously been used to capture trailing vortices, its quantitative effect on improving wake-integral drag predictions has not been investigated. In the present study, parameters of vorticity confinement are tuned and the advantages of using a variable confinement parameter are demonstrated. A combination of vorticity confinement with the wake-integral technique indicates that the computational fluid dynamics-predicted induced drag for wing with and without winglet becomes insensitive …
Optimal Allocation Of Boundary Singularities For Stokes Flows About Pairs Of Particles, M. Mikhaylenko, Alex Povitsky
Optimal Allocation Of Boundary Singularities For Stokes Flows About Pairs Of Particles, M. Mikhaylenko, Alex Povitsky
Dr. Alex Povitsky
Methods of allocation of singularities for the Method of Fundamental Solutions are proposed, implemented and applied to a Stokes flow about pairs of particles. New local normal and combined Stokeslets allocation methods are proposed to solve Stokes flows using a moderate number of singularities. In the proposed methods the singularities are located at surfaces inside the particles but dissimilar to the particles׳ shapes. Optimization of location of Stokeslets is performed for peanut-shaped and barrel-shaped particles. Convergence of numerical solution as a function of numbers of Stokeslets is evaluated and show substantial reduction in the needed number of Stokeslets compared to …