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学术报告:2018年12月19日,下午15:00-16:00,M. Muthtamilselvan,R. Rakkiyappan

编辑:www.402.com  发布时间:2018-12-18浏览次数:219

永利皇宫数学机构邀请专家申请表

  

报告人

M. Muthtamilselvan

单位

Department of   Mathematics,

Bharathiar University

报告题目

Nanofluid in a lid-driven cavity with uniform and   non-uniform heating of bottom wall

  

报告时间

2018/12/19

15:00-16:00

地点

永利皇宫第一报告厅

邀请人

曹进德

报告摘要

Steady state   two-dimensional mixed convection in a lid-driven square cavity filled with   Cu–water nanofluid is investigated numerically in the presence of internal   heat generation. In the present investigation, bottom wall is uniformly and   non-uniformly heated while two vertical walls are fixed and they are   thermally insulated. The top wall is moving from left to right at a constant   speed. The governing equations are normalized and solved numerically with   boundary conditions by finite volume approach using third order accurate   upwinding scheme (deferred QUICK). Effects of the pertinent physical   parameters are investigated in terms of the flow and temperature fields, as   well as Nusselt number distributions. The presented results show that the   solid volume fraction plays a significant role on the flow and thermal fields   and the Nusselt number distributions for different flow configurations. It is   found that Richardson number strongly affect the fluid flow and heat transfer   in the cavity. For Ri < 1, the forced convection becomes dominant in the   entire cavity, the natural convection relatively weak.

报告人简介

M. Muthtamilselvan received his Ph.D.   in 2008 from the Department of Mathematics, Bharathiar University, India. He   is currently professor at the Department of Mathematics, Bharathiar   University. His research interests are Computational Fluid Dynamics (CFD),   convection in nanofluids, boundary layer flow and heat transfer analysis. He   has published more than 45 articles in International reputed journals. He has   completed 2 major research projects funded by Govt. of India. He guided 4   Ph.D and 27 M.Phil. students in the area of Applied Mathematics. He has   reviewed more than 100 papers in International journals like, Heat and Mass   Transfer, International Journal for Numerical Methods in Fluids, IMA Journal   of Applied Mathematics,ASME Journal   ofComputational and Nonlinear Dynamics,   Journal of Mechanics, Engineering Applications of Computational Fluid   Mechanics, etc.

 

 

永利皇宫数学机构邀请专家申请表

  

报告人

R. Rakkiyappan

单位

Department of   Mathematics,

Bharathiar University

报告题目

Adaptive fractional fuzzy integral sliding mode control   for PMSM model

  

报告时间

2018/12/19

14:00-15:00

地点

永利皇宫第一报告厅

邀请人

曹进德

报告摘要

This presentation   aims to address the stabilization problem of permanent magnet synchronous   motor (PMSM) based wind energy conversion system (WECS) through a novel   adaptive fractional fuzzy integral sliding mode control (FFISMC) scheme in   contrast to the traditional integer order control schemes. The main objective   of modeling the fractional order control for nonlinear PMSM is to enhance the   convergence rate which is effectively better when compared to integer order   control schemes.

  

In addition, the   paper intensively investigates the performance of fractional order   controllers in both PMSM and surface-mounted PMSM-based WECS through   analyzing the global stability of closed-loop system based on Lyapunov   stability theory. In this regard, firstly, the nonlinear PMSM model is   transformed into equivalent linear sub-models through an effective   Takagi-Sugeno (T-S) fuzzy membership rules. Then, a novel automated   (adaptive) controller is designed along with fractional sliding surface which   involves an integral term to control the considered PMSM. In general,   adaptive controllers are much more effective than manual controllers.   Further, the sufficient conditions are derived in terms of linear matrix   inequalities (LMIs) via constructing the novel fractional fuzzy Lyapunov   functional with quadratic terms, which guarantees the global stabilization of   PMSM-based WECS. Overall performance and effectiveness of the proposed   theoretical results are demonstrated through numerical simulations.

报告人简介