检索结果-内蒙古大学图书馆

Study of aerophysical processes in the wind farm of the Republic of Adygey

AIP Conference Proceedings 2021年第1期2351卷

作者： A. V. Ivanov S. V. Strijhak 1)Ivannikov Institute for System Programming of the Russian Academy of Sciences (ISP RAS) 109004 Moscow Russia 2)M. V. Keldysh Institute of Applied Mathematic of the Russian Academy of Sciences (KIAM RAS) 125047 Moscow Russia

The article presents numerical modeling of meteorological processes in the wind farm of the Republic of Adygea. The wind farm has 60 wind turbines, the capacity of each wind turbine is 2.5 MW. A test configuration with 4 nested domains was developed to study the wind farm. The computations were carried out using the WRF-ARW computational code with the wind turbine parameterization module. The calculation was performed for the period 01.04.2020 00:00 – 01.05.2020 00:00 UTC. As a result, the dimensions of the wake formed by the wind farm were obtained, and the influence of the parameterization of wind turbines on the wind distribution calculation was shown. The potential vortex wake can reach sizes up to 15 km. The losses of generated power can reach 1 MW inside the vortex wake. The computations were run on high performance cluster UNIHUB of ISP ras.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Exact solutions of boundary integral equation arising in vortex methods for incompressible flow simulation around elliptical and Zhukovsky airfoils

引用

Journal of Physics: Conference Series 2019年第1期1348卷

作者： Kseniia Kuzmina Ilia Marchevsky Evgeniya Ryatina Ivannikov Institute for System Programming of the RAS Alexander Solzhenitsyn st. 25 Moscow 109004 Russia Bauman Moscow State Technical University 2-nd Baumanskaya st. 5 Moscow 105005 Russia

The problem of 2D incompressible flow simulation around airfoils using vortex methods is considered. An exact solution for the boundary integral equation with respect to a free vortex sheet intensity at the airfoil surface line that arises in such problems is obtained. The exact solution is constructed for flows around elliptical and Zhukovsky airfoils using the theory of complex potentials and conformal mappings technique. It is possible to take into account the influence of singularities in the flow domain — point vortices which simulate vortex wake. The obtained exact solutions can be used to verify and estimate the accuracy of numerical schemes for the boundary integral equation solution: such procedure is also described in details.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Cost-Efficient Numerical Schemes for the Boundary Integral Equation Solution in 2D Vortex Methods

引用

Journal of Physics: Conference Series 2019年第1期1348卷

作者： Kseniia Kuzmina Ilia Marchevsky Victoriya Moreva Evgeniya Ryatina Ivannikov Institute for System Programming of the RAS Alexander Solzhenitsyn st. 25 Moscow 109004 Russia Bauman Moscow State Technical University 2-nd Baumanskaya st. 5 Moscow 105005 Russia

The problem of the flow simulation around airfoils using Lagrangian vortex methods is considered. Numerical schemes of the second order of accuracy for free vortex sheet intensity distribution along the airfoil are developed for smooth and non-smooth airfoils. The schemes are based on the Galerkin approach with piecewise-constant and piecewise-linear basis functions. The finite element method ideas are used and the resulting piecewise-linear scheme has the same numerical complexity as the scheme with piecewise-constant numerical solution. The modification of a FEM-type scheme is developed for non-smooth airfoils which permits to take into account the discontinuity of the solution at the specified points; its computational cost increases insignificantly.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Preface

引用

CEUR Workshop Proceedings 2019年 2514卷 1-2页

作者： Avetisyan, Arutyun Ivar, Jacobson Pozin, Boris A. Petrenko, Alexander K. Pozin, Boris A. Petrenko, Alexander K. Cavalli, Ana Rosa Petrenko, Alexander K. Avetisyan, Arutyun Arlazarov, Vladimir Avdoshin, Sergey Batovrin, Victor K. Bershadsky, Alexander M. Boichenko, Alexander Juris, Borzovs Vasenin, Valery A. Schlingloff, Holger Kalyanov, Georgy Kantorovich, Georgy G. Korolev, Anton Kosolapov, Mikhail S. Kostogryzov, Andrey I. Koznov, Dmitry V. Kuznetsov, Sergey Prokhorov, Sergei Soyfer, Victor A. Starykh, Vladimir A. Stolyarov, Gennady K. Stupnikov, Sergey A. Telnov, Yury Ph. Shmid, Alexander Mira, Kajko-Mattssen Miroslawa Wentzl, Wilfried Mayer, Walter H. Yevtushenko, Nina Zakharov, Victor Zmeev, Oleg Cavalli, Ana Rosa Petrenko, Alexander K. Pozin, Boris A. RAS ISP Russia Ivar Jacobson International Switzerland NRU HSE «-leasing» Co Russia NRU HSE ISP RAS Russia Information and Analytical Systems «-leasing» Co Russia Department of Network Software TELECOM and Management SudParis France NRU HSE Russia Software Engineering of Ivannikov Institute for System Programming RAS Russia RAS System Analysis Institute of Federal Research Centre Informatics and Management Russia Russia Penza State University Russia Federal State Educational Centre of Higher Learning «Plekhanov Russian University of Economics» Russia CISA Academy of Sciences of Latvia State University of Latvia Latvia MSU Institut für Offene Kommunikationssysteme FOKUS Germany Verifikation und Testtheorie an der Humboldt-Universität zu Berlin Germany Institute of Control Sciences RAS Russia Institute of Sociology RAS NRU HSE Russia ISO IEEC Institute of Informatics Problems Federal Research Centre IM RAS Russia St. Petersburg State University Russia Institute for System Programming RAS Moscow State University Russia SRI Korolev Samara State Aerospace University Russia Belarus FRC IM RAS Russia FSEC «Plekhanov Russian University of Economics» Russia KTH School of Information and Communication Technology Sweden Governmental Agricultural Analyst Austria Austria Ivannikov Institute for System Programming RAS Russia Institute of Informatics Problems Federal Research Centre IM RAS Russia Tomsk State University Russia

来源：评论

学校读者我要写书评

暂无评论

On estimates of computational complexity and error of the fast algorithm in the vortex methods

引用

Journal of Physics: Conference Series 2020年第1期1614卷

作者： K S Kuzmina V S Moreva Bauman Moscow State Technical University 105005 Russia Moscow 2nd Baumanskaya str. 5 Ivannikov Institute for System Programming of the RAS 109004 Russia Moscow Alexander Solzhenitsyn st. 25

One of the efficient ways to speedup calculations in the vortex method, namely the Barnes – Hut-type algorithm, is considered. This method is based on the introducing of a hierarchical structure of domains (binary tree), which allows one to take into account approximately mutual influences of clusters of vortex elements located far from each other when calculating convective velocities. Estimates of the computational complexity of the algorithm for convective velocities calculating are derived, as well as estimates of the error, which depend on the parameters of the algorithm. In practice, these estimates make it possible to choose optimal values of the algorithm parameters and to achieve the maximal speedup of calculations at a given level of acceptable calculation error.

关键词：

来源：评论

学校读者我要写书评

暂无评论

RKDG method for 2D gas dynamics simulation on uniform rectangular meshes

引用

Journal of Physics: Conference Series 2019年第1期1348卷

作者： Victoria Korchagova Ivan Fufaev Vladimir Lukin Ilia Marchevsky Sofya Sautkina Bauman Moscow State Technical University 2-nd Baumanskaya st. 5 Moscow 105005 Russia Ivannikov Institute for System Programming of the RAS Alexander Solzhenitsyn st. 25 Moscow 109004 Russia Keldysh Institute of Applied Mathematics RAS Miusskaya sq. 4 Moscow 125047 Russia

This paper is devoted to a numerical simulation of 2D gas dynamics flows on uniform rectangular meshes using the Runge - Kutta - Discontinuous - Galerkin (RKDG) method. The RKDG algorithm was implemented with in-house C++ code based on the experience in the investigation of 1D case. The advantage of the RKDG method over the most popular finite volume method (FVM) is discussed: three basis functions being applied in the framework of the RKDG approach lead to a considerable decrease of the numerical dissipation rate with respect to FVM. The results of the acoustic pulse simulation on a sufficiently coarse mesh with the piecewise-linear approximation show a good agreement with the analytical solution in contrast to the FVM numerical solution. For the Sod problem, the results of the discontinuities propagation illustrate the dependence of the scheme resolution on the numerical fluxes, troubled cell indicator and the limitation technique choice. The possibility to resolve strong shocks is demonstrated with the Sedov cylindrical explosion test.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Application of the novel algorithm of vortex sheet intensity reconstruction to added masses estimation for complex-shaped bodies

引用

AIP Conference Proceedings 2023年第1期2849卷

作者： Ilia Marchevsky Georgy Shcheglov Bauman Moscow State Technical University Russia 105005 2-nd Baumanskaya st. 5. Moscow Russia Ivannokov institute for system programming of the RAS Russia 109004 Al.Solzhenitsyn st. 25 Moscow Russia

A novel algorithm of the Lagrangian vortex method is considered for incompressible flow simulation. The boundary condition on the body surface is satisfied by vortex sheet introduction, which intensity is determined from the equality between the tangential components of flow velocity limit value and the body surface velocity. High accuracy of velocity field reconstruction in the neighbourhood of the body surface permits to estimate unsteady aerodynamic loads for the complex-shaped bodies, including added masses tensor components with rather low computational cost.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Numerical modelling of two-dimensional perfect gas flows using RKDG method on unstructured meshes

引用

AIP Conference Proceedings 2018年第1期2027卷

作者： V. N. Korchagova I. N. Fufaev V. V. Lukin S. M. Sautkina Applied mathematics dep. Bauman Moscow State Technical University 2-nd Baumanskaya st. 5 Moscow 105005 Russia Ivannikov Institute for System Programming of the RAS Alexander Solzhenitsyn st. 25 Moscow 109004 Russia Keldysh Institute of Applied Mathematics Miusskaya sq. 4 Moscow 125047 Russia

This paper is devoted to the simulation of the two-dimensional gas flows with oscillations and discontinuities using the Runge — Kutta Discontinuous Galerkin (RKDG) method, that has been implemented in the code prototype written in C++. It implements the HLLC numerical flux, the KXRCF troubled cells indicator, the WENO S limiter with the local characteristic decomposition approach and algorithm of dynamic time step control. The computations could be performed on unstructured meshes with mixed cell types (quadrangular and triangular) which can be built in any mesh bulder in IDEAS UNV format (i.e. SALOME). The code is verified on the common numerical tests such as pulsating and vibrating cylinders, Sod-like cylindrical explosion, forward-facing step, blast wave problem. Comparison between analytical solution and numerical results obtained with the in-house code and the open-source OpenFOAM package is presented.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Simulation of viscoelastic flow past circular airfoil by using the modified LS-STAG immersed boundary method

引用

Journal of Physics: Conference Series 2019年第1期1348卷

作者： Valeria V Puzikova Applied Mathematics Department Bauman Moscow State Technical University 2-ya Baumanskaya st. 5 str. 1 Moscow 105005 Russian Federation Compiler Technology Department Ivannikov Institute for System Programming of the RAS Alexander Solzhenitsyn st. 25 Moscow 109004 Russian Federation

The LS-STAG immersed boundary cut-cell method modification for viscoelastic flow computations is presented. Rate type viscoelastic flow models (linear and quasilinear) are considered. Rate type viscoelastic flow models (linear and quasilinear) are considered. The obtained numerical method is implemented in the LS-STAG software package developed by the author. This software allows to simulate viscous incompressible flows by using the LS-STAG method and it modifications. The LS-STAG-discretization of extra-stress equations for viscoelastic Maxwell, Jeffreys, upper-convected Maxwell, Maxwell-A, Oldroyd-B, Oldroyd-A, Johnson Segalman fluids was developed. Formulae for differential types of convected time derivatives (Oldroyd, Cotter — Rivlin, Jaumann — Zaremba — Noll derivatives) the LS-STAG discretization was obtained. Normal non-newtonian stresses are computed at the centers of base LS-STAG mesh cells and shear non-newtonian stresses are computed at the cell corners. Time-stepping algorithm is based on the first order predictor-corrector scheme. To validate developed numerical method the test problem about viscoelastic Oldroyd-B flow past a circular airfoil was used. Computational experiments were carried out at Weissenberg number in the range from 0 to 4. The computed values of the drag coefficients and the wake length are in good agreement with the experimental data.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Comparison of WENO and HWENO limiters for the RKDG method implementation

引用

AIP Conference Proceedings 2018年第1期2027卷

作者： I. N. Fufaev V. V. Lukin I. K. Marchevsky V. D. Galepova 1Applied mathematics dep. Bauman Moscow State Technical University 2-nd Baumanskaya st. 5 Moscow 105005 Russia 2Keldysh Institute of Applied Mathematics Miusskaya sq. 4 Moscow 125047 Russia 3Ivannikov Institute for System Programming of the RAS Alexander Solzhenitsyn st. 25 Moscow 109004 Russia

The results of comparative study of the WENO-type monotonization methods for numerical solution of the Euler equations computed by the discontinuous Galerkin method are presented. The variants of the technique based on Lagrangian and Hermitian interpolation are analyzed. Test simulations for the Sod problem, which solution contains a shock wave, a rarefaction wave, and a contact discontinuity, are performed. The merits and demerits of the considered variants of the limiters including the questions of the numerical solution monotonicity, numerical dissipation magnitude, computational costs and extensibility of software implementation are investigated.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：