Centre of Excellence for Computational Mechanics Ramaiah Group 1
Outline • Structure of Centre of Excellence in Computational Mechanics • Centre of Excellence Researchers • Vision, Mission and Goals of Centre of Excellence • Research activities carried out • Research Areas of Interests to be Explored 2
Structure of Centre of Excellence in Computational Mechanics Computational Fluid Dynamics • Low Reynolds number flows Computational Structural Mechanics • External flows • Structural Analysis and Optimisation • Internal flows • Composites • Fluid-structure interaction • Damage Tolerant Design • Multi-Disciplinary Analysis and Optimisation Computational Mechanics Structural Dynamics and Earthquake Engineering • Modal, Harmonic, Shock and Random vibration analysis • Earthquake Geotechnical Engineering 3
CoE Researchers Associate Professor, Dept. of Composites Damage Dr. Rahul M. B.E., Mechanical and Tolerant Design and Cadambi M. Tech, Ph. D. Manufacturing Polymer Nanocomposites Engg, RUAS Professor, Dept. of B.Sc., D.M.I.T Aircraft Design, Prof. H . K. Aerospace Engg, [Aero], M.E., Aerodynamic Shape Narahari RUAS Ph.D. Optimization and MDO Associate Low Reynolds Number Dr. M. Professor, Dept. of M.Sc. (Engg), Aerodynamics, Sivapragasam Aerospace Engg, Ph. D. Aerodynamic Shape RUAS Optimization Associate Discrete Element Dr. Anitha B.Tech, M.S. Professor, Dept. of Modelling, Soil Kumari (Res), Ph. D. Civil Engg, RUAS Liquefaction 4
CoE Researchers (Continued) Professor, Dept. of B.E., M.E., Finite Element Method Prof. Dinesh P. Mechanical Engg, Ph.D. and Fracture Mechanics RIT Heat and Mass Transfer, Fluid Flows, Associate M. Sc., M. Sc. Computational Fluid Dr. Dinesh P. A. Professor, Dept. of (IT), M. Phil., Dynamics, Bio – Mathematics, RIT Ph. D. Mechanics, Statistical Analysis and Modeling Assistant Earthquake Engineering, Mr. Basavana B.E, M. Tech., Professor, Dept. of Soil Dynamics, Structural Gowda G. M. (Ph.D.) Civil Engg, RIT Dynamics Technical CFD, FSI, Heat Transfer Manager, B.E., M.Sc. Mr. Parikshith N. and Composite Structure Technocentre, (Engg) Simulation RUAS 5
CoE Researchers (Continued) Associate Professor, Computational Electro- Dr. B. Ramaswamy Dept. of Electronics B. E., M.Sc. Magnetics, DSP Algorithms, Karthikeyan and Communication (Engg.), Ph. D. Communication Engineering Engg, RUAS Assistant Professor, Computational Electro- Dept. of Electronics B. E., M.Sc. Magnetics, Modelling of RF Mr. Varun D. and Communication (Engg.) Front-End and Communication Engg, RUAS Engineering Project Engineer, Structural, Implicit and Explicit Mr. Nagaraju T. R. B.E., M. Tech Technocentre, RUAS Dynamic Simulations Project Engineer, CFD, Heat Transfer and Mr. Siddarth Akki B. E., M. Tech Technocentre, RUAS Structural Simulation Valdel Advanced Mr. Sheel Kumar FEA, Structural Analysis of Technologies Ltd., B.Tech., M. Tech. Srivastava Composites and Metals Bengaluru 6
Vision and Mission of CoE Vision • To build a pro-active multi-disciplinary computational mechanics research group involving academicians, researchers and students to solve contemporary research problems of interest to academia and industry Mission • To apply computational mechanics framework to solve contemporary research problems in structural mechanics and fluid mechanics 7
Envisaged Goals of CoE • To teach and explore outreach in the field of Computational Fluid Dynamics and Computational Structural Mechanics • To establish synergy between academia and industry for pursuing high end applied research • To transfer technologies developed for commercialization and entrepreneurship 8
Composites – Structures, Damage Tolerant Design 9
Failure of Composites – Curing Defects in T Joints Modelling Approach Pull-Out Results Parametric Studies for Lay-up Optimisation 10
Microstructural Damage of Single Fibre Composites – Longitudinal Loading Modelling Approach Simulation Results A 1 Mat. Sci. Eng. A, 2008 B C Comparison of Microstructural Damage of Experimental and Simulation Observation 11 Experimental Results 1 Simulation Results
Microstructural Damage of Single Fibre Composites – Transverse Shear Loading Modelling Approach Simulation Results Simulation of Microstructural Damage B C D E A 12
Machining damage – MD-CFRP Conventional Drilling 13
Machining damage – MD-CFRP Conventional Drilling Delamination study at Drill entry Experiment and Simulation (a) (b) 14 Composites Drilling Process Parameters (a) Experiment and (b) Simulation
Structural Analysis Vibration Shock Modal Buckling and Implosion Vibration Impact Fatigue 15
Structural Analysis of Electronic Consoles Single Display Unit Double Display Unit Receiver Cabinet APD P07 Unit Three Axis Tracker Mount Chiller Unit 16
Replacement of Metallic Battery Panel to Composite 17 17
Finite Difference Modelling (Liquefaction Analysis) 18
CFD Analysis 19
Optimization at Ultra-Low Reynolds Numbers 4 V-35 3.9 V-50 0.2 V-25 1 ( C l / C d ) max 0.78 0.1 0.56 V-15 0.34 3.8 0.12 y/c -0.1 0 -0.32 -0.54 -0.76 -0.1 -0.98 3.7 -1.2 V-5 -0.2 0 0.5 1 1.5 x/c 3.6 0 10 20 30 40 50 60 Iteration 20
Aerodynamics of Low Reynolds Number Flows α = 1˚, C l = -0.0299 Re = 50,000 21
Propeller Slipstream Effects on MAV Wing 0.24 0.05 Re = 50,000 Re = 50,000 0.22 Re = 100,000 Re = 100,000 Re = 150,000 Re = 150,000 0.2 0.045 0.18 0.16 0.04 0.14 C D C L 0.12 0.035 0.1 0.08 0.03 0.06 0.04 0.025 0.02 0.02 0 1 2 3 4 5 6 7 8 0 1 2 3 4 5 6 7 8 (deg) (deg) 22
Wing Optimization for Transonic Business Jet 23 Rao et al., SAROD 2018
Supersonic Retropropulsion 24
CFD Analysis Internal Aerodynamics External Aerodynamics BLDC Generator Electromagnetic and Thermal Analysis Engine Cooling 25
Thermal/Heat Transfer Analysis of Electronic Console C Band Unit TRMM Unit K Band Unit CNT-DIO Cards 26
Characteristics of Shock Vector Controlled Fluid Thrust Vectoring System for Jet Engine Sponsoring Agency: Aeronautics Research & Development Board (AR&DB) Shock controlled fluidic thrust vectoring at -with out and with secondary fluidic injection 27
Prediction of Bird-hit Damage on Fan Blades in an Aircraft Engine FE model of fan blade with disc and bird Stress distribution in blade at without and with pre-stress condition 28
Cooling Concepts Related to Gas Turbine Blades Sponsoring Agency: Gas Turbine Research Establishment (GTRE), Bangalore under GATET Geometry of a turbine blade showing all Comparison between present computation and cooling methods published literature of thermal contours at different planes 29
Discrete Element Modelling (DEM) 30 30
Discrete Element Modelling 60 Confining pressure = 100kPa Frequency = 1Hz Amplitude of strain rate = 0.006 40 Deviatoric stress (kPa) 20 0 0 2 4 6 8 10 12 14 -20 No of cycles -40 -60 -60 -40 Deviatoric stress (kPa) -20 Normal contact force histograms 0 1 1 1 1 0.8 0.8 0.6 0.6 1 0.5 0.5 0.4 0.4 0.2 0.2 0.5 0 0 20 0 0 Confining pressure = 100kPa -0.2 -0.2 -0.5 -0.5 0 -0.4 -0.4 Frequency = 1Hz -0.6 -0.6 -1 -1 -0.5 1 Amplitude of strain rate = 0.006 -0.8 1 1 -0.8 0.5 0.5 1 0.5 1 -1 -1 1 0.5 0 0.5 -1 -1 0 0 0.5 0 0 40 -1 -0.5 1 -0.8 -0.6 -0.5 -0.5 0 -0.4 -0.5 -0.5 -0.5 0.5 -0.2 0 0 0.2 0.4 -1 -1 -0.5 0 0.6 -1 -1 -0.5 0.8 1 -1 0.5 0.8 1 0.2 0.4 0.6 -1 -1 1 -0.4 -0.2 0 -1 -0.8 -0.6 Spherical harmonic distribution of normal contact force 60 0 -1 -2 -3 -4 -5 Axial strain (%) 0.1 0.1 0.1 0.1 0.1 0.05 0.05 0.05 1.0 0.05 0.05 0 0 0 0 0 -0.05 -0.05 -0.05 -0.05 -0.05 -0.1 -0.1 -0.1 -0.1 -0.1 0.1 0.1 0.1 0.1 0.1 0.05 0.1 0.05 0.1 0.05 0.1 0.05 0.1 0.05 0.1 0.05 0.05 0.8 0.05 0 0 0.05 0 0 0.05 0 0 0 0 0 0 -0.05 -0.05 -0.05 -0.05 -0.05 -0.05 -0.05 -0.05 -0.05 -0.05 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 Spherical harmonic distribution of tangential contact force Pore pressure ratio 0.6 Confining pressure = 100kPa Frequency = 1Hz Amplitude of strain rate = 0.006 0.4 0.2 Near to liquefaction Isotropic Extension Compression 31 0.0 Liquefaction behaviour 0 2 4 6 8 10 12 No of cycles
Landslide: Slope Stability Underground Tunnels Profile at the end of second failure due to Rice Polishing Machine landslide 32
Computational Electro-Magnetics (CEM) 33 33
Vivaldi Array ~80 mm ~48 mm Vivaldi Array Vivaldi Array Beamsteering 34
Vivaldi Array Placement Studies RAS ARRAY PLACEMENT ON WING 35
Thermal Analysis of Three Phase Squirrel Cage Induction Motor for Computation of Minimum Temperature Prediction of temperature under Air flow vector plot steady state condition for rated load 36 Vector plot of Air flow over the fins Plane section of motor
Simulation Studies on Time Domain Analysis of Magnetic Flux in Three Phase Squirrel Cage Induction Motor Magnetic Flux Density in Stator, 37 Rotor and Air-gap
Computational Electromagnetic Simulations 38
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