A5006852001- Lattice Boltzmann Simulation Studies
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics and Turbulent Flows
- Computational Fluid Dynamics and Aerodynamics
- Aquatic and Environmental Studies
- Material Science and Thermodynamics
- Advanced Numerical Methods in Computational Mathematics
- Heat Transfer and Mathematical Modeling
- Fluid Dynamics Simulations and Interactions
- Particle Dynamics in Fluid Flows
- Differential Equations and Numerical Methods
- Rheology and Fluid Dynamics Studies
- Statistical and numerical algorithms
- Computational Physics and Python Applications
- Icing and De-icing Technologies
- Computer Graphics and Visualization Techniques
- Aerodynamics and Fluid Dynamics Research
- Advanced Computational Techniques and Applications
- Distributed and Parallel Computing Systems
- Vibration and Dynamic Analysis
- Methane Hydrates and Related Phenomena
- Plasma and Flow Control in Aerodynamics
- Engineering Applied Research
Institute for System Programming
2019-2021
Bauman Moscow State Technical University
2013-2019
Murmansk State Technical University
2016-2018
A software package is developed for numerical simulation of wind turbine rotors autorotation by using the modified LS-STAG level-set/cut-cell immersed boundary method. The level-set function used boundaries description. Algorithm construction complex-shaped airfoils, based on Bézier curves usage, proposed. Also, algorithm recalculation at any time without reconstructing curve each new rotor position described. designed second-order Butterworth low-pass filter aerodynamic torque filtration...
Immersed boundary methods have become popular in Computational Fluid Dynamics over recent years for simulating flows through complex solid geometries and coupled hydroelasctic problems. The advantage of these a method with body-fitted mesh is their computational efficiency: they do not require regridding when domain shape changes the simulation process due to hydroelastic body motion. LS-STAG viscous incompressible combines advantages immersed methods, marker cells (MAC) level-set method....
Significant part of the computational work in numerical simulations technical systems, physical phenomena and technological processes is solving linear algebraic equations systems arising from discretization corresponding differential or integrodifferential equations. There are several classes iterative methods for solving, which differ by approach to construction next approximation. These based on splitting, variational-type projection-type methods. The aim this study development efficiency...
We constructed the LS-STAG discretisation for 2D Reynoldsaveraged Navier -Stokes equations, filtered equations (as used large eddy simulation and detached simulation) employed in Smagorinsky, Spalart -Allmaras, , k kMenter's Shear Stress Transport turbulence models.We added a fourth grid to mesh consisting of three staggered grids.We computed following parameters at centres additional cells: turbulent shear stress and, depending on model used, kinetic energy, viscosity, energy...
In this study we present the modification of LS-STAG immersed boundary cut-cell method. This is designed for viscoelastic fluids. Linear and quasilinear fluid models a rate type are considered. The obtained numerical method implemented in software package developed by author. created viscous incompressible flows simulation both it modifications. Besides this, to compute extra-stresses Maxwell, Jeffreys, upper-convected Maxwell-A, Oldroyd-B, Oldroyd-A, Johnson --- Segalman fluids on mesh....
The LS-STAG immersed boundary cut-cell method modification for viscoelastic flow computations is presented. Rate type models (linear and quasilinear) are considered. Formulae differential types of convected time derivatives the discretization was obtained. Normal non-newtonian stresses computed at centers base mesh cells shear cell corners. LS-STAG-discretization extra-stress equations Maxwell, Jeffreys, upper-convected Maxwell-A, Oldroyd-B, Oldroyd-A, Johnson - Segalman fluids developed....
The main goal of modern hemodynamic simulation is the prediction blood pressure in arteries, as well study various factors complex effect on cardiovascular system characteristics. Quasi-one dimensional models flow through vessels are most popular. They allow to model entire vascular system. Since full-scale requires large computational costs, problem parallelizing computation actual. In this paper, efficiency was carried out for parallel algorithms numerical quasi-one-dimensional...
Для моделирования течений вязкой несжимаемой среды методом погруженных границ LS-STAG и его модификациями разработан параллельный программный комплекс LS-STAG_ext. Комплекс позволяет моделировать обтекание движущихся профилей произвольной формы систем из любого числа профилей, имеющих одну или две степени свободы. LS-STAG_ext поддерживает использование таких технологий параллельного программирования, как Intel Cilk Plus, Threading Building Blocks OpenMP. Представлены результаты сравнения...
The efficiency comparison of solvers for sparse linear algebraic equations systems based on one the fastest iterative methods, BiCGStab method (bi-conjugate gradient with stabilization), and FGMRES (flexible generalized minimal residuals) is presented in this study. Estimates computational cost per iteration are considered methods. condition imposed Krylov subspace dimensionality obtained. When fulfilled, less than BiCGStab. In addition, modification, which allows to stop algorithm before...
The boundary element method usage for the numerical simulation in continuum mechanics problems leads to need solve a system of linear algebraic equations with dense matrix. de facto standards interface functions over matrices and vectors software implementations are BLAS/LAPACK. Among optimized open-source BLAS/LAPACK implementations, only OpenBLAS library includes optimizations widest range hardware platforms. This is Intel, AMD, ARM RISC-V architectures. open architecture ecosystem...
As a rule, the main part of computational costs in numerical solution problems continuum mechanics consists solving large sparse systems linear algebraic equations. For this reason, efficient parallelization particular procedure can significantly speed up simulation. To solve problem, two approaches be used. The simplest approach parallelizing matrix-vector operations usual iterative solver. It requires several synchronization points and exchanges coefficients at each iteration solver, which...
Abstract The LS-STAG immersed boundary cut-cell method modification for viscoelastic flow computations is presented. Rate type models (linear and quasilinear) are considered. obtained numerical implemented in the software package developed by author. This allows to simulate viscous incompressible flows using it modifications. LS-STAG-discretization of extra-stress equations Maxwell, Jeffreys, upper-convected Maxwell-A, Oldroyd-B, Oldroyd-A, Johnson Segalman fluids was developed. Formulae...