Tetra He Drix

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Private & Confidential

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Tetrahedrix Engineeringhttp://www.tetrahedrix.com/

2012




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Company Background 3

Expertise 7

Case Studies 16

Contact Details 37

Table of contents




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Company Background




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Tetrahedrix Engineering | Domain & Offerings

Aerospace Engineering

Mechanical Engineering

Ocean/Marine Engineering

Domain Offerings

Customized Design Tools

• Numerical Simulation

• Customized as per client needs

• Multi-physics models

• Standalone GUI

• Portable to all OS’

Services

• CFD simulation• Meshing of complex models

• Various physics models




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Tetrahedrix Engineering | Team

MANAGEMENT

Akshay Vir, B.Tech. IIT (Aero 1996)

Arvind Singhal, B.Tech. IIT (Aero 1997)

Sameer Ningoo, B.Tech, UDCT (Chemical 1990)

V. Krishnan. B.Tech, IIT (Civil 1999), Harvard University (2001)

Ajay Kumar, B.Tech & M.Tech IIT (Aero 2007)

Rajiv Jain, B.Tech. IIT (Electrical 2002) Over 50 years of cumulative experience in

Fluid dynamics

Aerodyamics

Simulation

Programming

Work experience with multinationals

SCIENTISTS PANEL

Dr L Raja, Faculty – University of Texas, Austin

Dr Anupam Sharma – Btech-IIT, Phd – Penn State University

Dr Balaji Ramkrishnan – Faculty – IIT Mumbai

Dr Sundarrajan Krishnan – B.Tech – IIT, Phd - Stanford

University

Dr Sulagna Chatterjee – PhD University of Texas, Austin

TECHNOLOGY TEAM PROFILE

Venkat Ganapthy – Director – Mr Venkat Ganapathy has spent his

career in Automotive Industry and Financial Services. He served as

Finance Director of Bharat Forge and later COO of High Yield Hedge

fund of Gartmore.

Anurag Sharma – Founding Director & CTO – Mr Anurag Sharma is

an IIT Mumbai alumnus and handled product development of Fluent

Inc, before starting Tetrahedrix

Anubhav Singh – Director – Mr Anubhav Singh is an alumnus of IIT

Mumbai, Carnegie Mellon University and IIM Bangalore. He has spent

his career in finance in bond trading, high yield and special situations

investments in the US & Indian markets




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Tetrahedrix Engineering | Clients

Tetrahedrix has worked both directly and in collaboration for

global corporations and Government organizations like

• Defense Research Labs and Universities;

• Indian and US Government Departments;

• CFD firms;

• Oil &Gas Majors;

.

Some of the key entities for whom we have worked are -

• DRDO – Jodhpur• ARDE|IDST Pune

• British Petroleum

• Numeca Intl, Belgium

• Ascomp, Switzerland

• Esgee Technologies, Austin, TX

• Amoeba Technologies, Austin, TX

• CNU, South Korea

• US – Department of Forest

• Geometric Software - India




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Tetrahedrix Expertise




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Our Expertise | Customized Design Tools

Ful ly customized to meet c l ient requi rements

Standalone packages with interactive graphics

Compat ib le wi th al l operat ing systems

Compat ib le wi th other packages

MESH GENERATION SOLVER CAPABILITY POST-PROCESSING

• Can handle complex geometries

• Automatic (push-button) meshing

• Block-structured meshes

• Unstructured meshes

• Hexahedral dominant

• Cut-cell (polyhedral) meshing

• Stair-step meshes

• Deforming and moving meshes

• Boundary-layer resolution using extruded

prisms

• Subsonic, transonic and supersonic flows

• Various physics models

• Combustion modeling

• Radiation modeling

• Natural/forced convection

• Multi-phase flows

• Particle tracking

• Multiple Turbulence models (k-e, k-omega,

RNG k-e, LES)

• Fluid-structure interaction

• Various numerical schemes possible

• Parallel processing to utilize cluster

computing and multi-core computers

• Capable of working on large data sets

• Multiple visualization tools

• Cutting-planes

• Contoured surfaces

• Iso-value surfaces

• Streamlines

• Vector plots

• 3D field visualization

• Animations




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Our Expertise | Software Development Services

EXPERIENCE STRENGTHS PROGRAMMING TOOLS

• Over 30 years of collective development

experience

• Worked with international companies

• Project management (ISO 9001 practices)

• Team management

• Worked on large scale complex software

systems

• Good understanding of object-oriented design

and development

• Adept at open-source CFD tools like

OpenFOAM and Gerris3D

• Ability to integrate third-party modules into

the customized package

• Languages – C++, Python, Java

• Graphics – OpenGL, OpenInventor, HOOPS

• GUI – Qt (from Nokia) and WxWidgets

• MPI for parallel-processing• Fluent Inc • Mentor Graphics

• Numeca Intl • Sungard

• Unigraphics • Kanbay

• Geometric Software • I-flex




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Our Expertise | CFD Applications – Aerospace Engineering

• Aerodynamic analysis of air-borne vehicles

• Aerodynamic coefficient generation

• Lift and drag analysis

• Shock-structure resolution

• Store separation analysis

• Helicopter rotor downwash simulation

• Missiles – configuration design

• Rockets – solid propellant burn profile

• Bombs/missiles – coefficient generation for cruciform configurations with

modifiable parameters

• Engine de-icing analysis

• Conjugate heat transfer

• All modes of heat-transfer can be modeled (conduction/ convection/

radiation)

INTERNAL & EXTERNAL FLOWS FLUID-STRUCTURE INTERACTION

HEAT TRANSFER DESIGN TOOLS




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Our Expertise | CFD Applications – Mechanical Engineering

• Swirling flows

• Rotating reference frames

• Screech analysis

• Drag and lift analysis for motor vehicles

• Under-hood heat-transfer analysis

• Downward lift prediction because of spoilers and canards

• Aero-acoustic – noise simulation

TURBO-MACHINERY ANALYSIS AUTOMOTIVE




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Our Expertise | CFD Applications – Marine/Offshore engineering

RESERVOIR MODELLING OCEAN/MARINE ENGINEERING OFFSHORE DRILLING

• Discrete fracture network modeling

• Advanced meshing algorithms to capture

fracture networks

• Flow through porous media

• Wave propagation modeling

• Discrete phase flows

• Hull stability analysis

• Platform aerodynamics

• Motion analysis - Multi-phase flows

• Gas dispersion




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Case Studies




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Case Study – RAMJET flow simulation

• Viscous, supersonic flow at the intake cone of a RAMJET

vehicle

• Intricate mixed (internal/external) flow simulation and data

analysis

• Complex shock & separation structure, with a

supersonic/subsonic tongue instead of terminal shock

• Over 400 simulations required at different Ma, altitude and

AoA

PROBLEM DESCRIPTION




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• Customized software package suite developed from

scratch

• Mesh – hand made for required geometry

• Automated capability for solution setting and data

gathering

• Solver – OpenFOAM

• Post-processing – Paraview

• Data analysis – variables/coefficients plots as

functions of Ma/AoA/altitude

• Frontend – Qt & OpenGL

SOLUTION APPROACH




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• Standalone package capable of –

• Setting up cases for different boundary conditions,

• Analyzing data for correlation of flow variables with

boundary conditions

• Integrated solver capable of running cases on distributed

computing facilities

• Data for different Ma, altitude and AoA

DELIVERY ITEMS

End-to-end solution developed and delivered (with data) in 6 months




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Case Study – Aerodynamic analysis of aircraft wing

Aerodynamic analyses of aircraft wing comprising of –

- Mach number variation over the wing and fuselage

- Check for vortex shedding at nosecone/wing-tips at

non-zero AoA

- Check for recirculation bubbles over the wing surface

and nosecone

- Study results for AoA range (-3 to +3 degrees)

- Compute wing coefficients and center-of-pressure

- Operating conditions –

- Mach number: 0.66

- Ambient temperature: 300 K

- Speed: 810 km/hr at AoA = +3 degrees

PROBLEM DESCRIPTION

Wing geometry before clean up

Wing geometry after clean up

C St d




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Following solution proposed for analysis

- Geometry clean-up / domain creation using SALOME- Meshing using in-house packages

- CFD analysis using OpenFOAM

- Post-processing using ParaView

Initial study as proof-of-ability

- Ability to handle numerics for compressible flows

- Ability to provide end-to-end solutions independently

- Geometry → Mesh → CFD analysis → Results →

Reports

Higher-fidelity CFD analysis proposed, comprising of –

- Compressible solution with viscous layer resolutions

- Turbulence effects( RNG k-epsilon model for

turbulence)

- Use 0.25% atmospheric turbulence

- Run simulations for various AoA values

- Compute wing pitching moments and center-of-

pressure

- Check for maximum Mach values and recirculation

bubbles in the domain

- Nosecone aerodynamic analysis- Complete body aerodynamic analysis (body with wing)

SOLUTION APPROACH

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• Output data with schematic of analysis process including

meshing details and solver algorithms -

• Mesh Details –

• Complete tetrahedral mesh

• Generated using in-house codes as well

as Salome algorithms

• 893,000 tetrahedral cells

• Clustering near the wing leading edge for

better resolution

• Solver specifications –

• Compressible Navier-Stokes flow solver

• Turbulence modeling possible (but not

performed due to time constraints)

• Solution performed in parallel on a 2-node

machine using MPI

DELIVERY ITEMS

C St d




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Case Study – Multi mode Heat Transfer Analysis Package for Vertical Tail Plane

• Standalone package capable of –

• Predicting heat transfer profile inside a glass

furnace

• Account for conduction; convection and radiation

• Handle complex geometry of a vertical tail plane

• Plane coated with solar radiation retarding paint

• Account for 3D thermal propagation

• Physics model to be developed in-house

• Interactive graphics required for start/stopping solution

• Elaborate GUI requirements for results display and

analysis

PROBLEM DESCRIPTION

Case Study M lti d H t T f A l i P k f V ti l T il Pl




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• Studying the implementation of P1 radiation model and

Marshak boundary condition in OpenFOAM

• Based on Boussinesq approximation

• Modification/addition of boundary conditions to allow

specification of radiation flux at the boundary to specify

solar radiation flux.

• Given the low air speed, a model developed for heat

transfer due to forced external convection, as an additionalboundary condition parameter.

• Implementation of radiation effects in the CHT solver.

Specifically, to specify emissivity at the surfaces of solids

participating in the heat transfer

SOLUTION APPROACH

Case Study M lti d H t T f A l i P k f V ti l T il Pl




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• Standalone package –

• Developed in C++

• GUI in Qt and Open GL

• Boundary conditions specified through GUI

• Capabilities –

• Radiation model

• Buoyancy model

• CHT + natural convection

• Creation of a new solver to account for the physics and

specific boundary conditions

DELIVERY ITEMS



Case Study Heat Transfer Analysis Package for Glass Furnace




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Case Study – Heat Transfer Analysis Package for Glass Furnace

• Modeling - 1D equation modeling the physics developed

with in-house analysis

• Solution –

• Runge-Kutta algorithm for iterative solution

• Time-marching for dynamic analysis

SOLUTION APPROACH

Case Study Heat Transfer Analysis Package for Glass Furnace




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Case Study – Heat Transfer Analysis Package for Glass Furnace

• Standalone package –

• Developed in C++

• GUI in Qt and Open GL

• Boundary conditions specified through GUI

• Ability to launch the solver in the background

• GUI capability to update the solution process iteratively

• Visualization – Temperature contour plots for the furnace

interior

DELIVERY ITEMS

End-to-end solution developed and delivered (with data) in 4 months

Case Study – HEXPRESS development




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• Development of advanced algorithms for fully-hexahedral

meshing of complex geometries

• Understanding of existing framework encompassing

geometry, topology, meshing and visualization modules

• Reduction of memory consumption and improvement of

performance needed

PROBLEM DESCRIPTION

Numeca was founded by Prof. Charles Hirsch in 1991. He is renowned as one of the founding figures of CFD.





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Case Study HEXPRESS development

• Research –

• In-depth study of the existing algorithms andframework to identify areas of improvement

• Comprehensive study of modern meshing

algorithms being developed worldwide

• Solution – selection and modification of chosen algorithms

to meet the requirements

SOLUTION APPROACH





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Case Study HEXPRESS development

• Architecture and algorithm design –

• Made fundamental modifications to thearchitecture and data-structure of the package

• An order of magnitude improvement in

performance

• 75% reduction in memory consumption

• Added over twenty features/algorithms to the

package to enhance functionality

• Automated the mesh-generation process to cater to the

geometry and topology of the model

DELIVERY ITEMS

Case Study - Automated Meshing of Complex Fracture-Network




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Case Study Automated Meshing of Complex Fracture Network

• Meshing of complex network of discrete fractures, along

with diverse well shapes

• Arbitrary overlap/intersection of fracture surfaces

• Planar/Non-planar fractures

• Presence of sharp edges and acute angle between

surfaces

• Fast processing of information needed to be able to meshthe domain in very short times

PROBLEM DESCRIPTION

Case Study - Automated Meshing of Complex Fracture-Network




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Case S udy g p

• A standalone tool for automatic meshing of fracture

network

• Checks intersections between surfaces

• Creates conformal topology for meshing

• Automatic surface/volume meshing using adaptive

Cartesian trees

• Ability to exactly model the fracture surfaces

• Ability to handle small angles between surfaces

• Automatic mesh-size control as per local topological

requirements

SOLUTION APPROACH

Case Study – Propellant Burn Simulation Inside Howitzer class Gun – ARDE - Pune




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PROBLEM DESCRIPTION

• Standalone package for simulation of burning

of propellant in a Howitzer class gun barrel

• Ability to generate pressure-temperature-time

behavior inside the gun chamber

• Ability to specify target peak pressures to be

achieved for different gun parameters

• Simulate ‘progressive burning’ of the

propellant with time

Case Study - Defense Lab (DRDO), Jodhpur




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PROBLEM DESCRIPTION

• Standalone package for setting up models for

image-processing analysis

• Ability to launch MATLAB simulation from the

package

• Ability to visualize solution data

We have l imi tat ions on sh ar ing more informat ion on this project owing to the sensi t ive nature of the project

Project Descartes – Advanced automatic mesh generation




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PROBLEM DESCRIPTION SOLUTION APPROACH DELIVERY ITEMS

• Stair-step meshing of arbitrarily complex

geometries

• Need for low-memory and very fast

processing

• Meshing algorithms –

• Based on adaptive Cartesianmeshing

• Capable of automatically resolving

geometric curvature and topology

• Architecture - Devised new data-structures to

minimize memory consumption without

reduction in processing speed

• C++ library capable of automatically meshing

the imported model and exporting the mesh

in the desired format

• Extremely fast processing – more than a

million cells can be generated in a minute

• Low footprint: - less than 1 GB of RAM for a

million cells

Contact Details




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Email: [email protected]

Mobile: +91 9833867531

ANUBHAV SINGH

RAJIV JAIN

VENKAT GANAPATHI


Mobile: +91 9822019177


Mobile: +91 9414186163

mailto:[email protected]






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