CEM and Radar Cross Section @ Zeus Numerix

1Build-to-Specifications | Product Approval | Engineering Services | Software Development
CEM/Stealth Capabilities @
Zeus Numerix
Capabilities on stealth estimation, antenna design and
code development in electromagnetics
V3
Abhishek Jain

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©ZeusNumerixPvtLtd:ConfidentialDocument
Presentation Overview
20 June 2019 Capabilities on Computational Electromagnetics @ Zeus Numerix
 Zeus Numerix – an Introduction
 Journey started from development of India’s first industrial CEM software
 No 1 Know-Why company reducing RCS of ship and airborne objects (shape optimization)
 Non-confidential Case studies
 Compressible flow examples
 Incompressible flow examples
 Non-conventional and coupled problems
 Team and Closure
 The presentation is non-confidential and some data may be masked
 Legends in the presentation are not shown purposefully
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2004
1st Project Completed
Large Defense Project
2005 2006
1st Software Export
System design software: Korea
2007
2008
CEM Software
UAV RCS Reduced
2009
1st Built-to-Spec project
Supersonic ground
vehicle developed
2010
Fire Safety & Comfort
Building fire and HVAC
2011
Control Software
In-house development
2012
2013
Parallel GPU code Devp
Visualize big data – 4 billion points
2015
Floating Panel Design
Solar Panels in Lake
2017
1st foreign missile project
Integration & Certification
2018
1st MSME TDF Winner
D&D of Composite Sea Water Pump
2019
Incubated at IIT Bombay
Journey Begins with India’s 1st
Commercial CFD software!
400th project completed
Lockheed Innovation
Medal & India Govt
R&D Certificate
CEM Software
CEMILAC Certification
1st Store Separation
project complete
www.zeusnumerix.com/portfolio
The Journey

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Customers List: Partial

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Accolades

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Core Offerings
Product
Development
Initial sizing from first
principles
Detailed analysis
based design
Prototype
development
Testing and validation
Product
Approval
Performance
estimate by analysis
Detailed Report
Generation
Review with approval
agency
Final submission and
product approval
Engineering
Services
Design calculation
reports
Analysis – CFD, FEM,
CEM
Failure analysis and
design suggestions
Multi-disciplinary
design optimization
Software
Development
Pre-processing
Automation
Solver development
from Literature
survey
Visualization, parallel
code CPU/GPU & GUI
System simulation
tools

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CEM Capabilities
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EM Methods
• Finite Volume Time Domain (FVTD)
• Physical Optics (PO/PTD/SBR)
• FDTD and FEM methods, validation
Radar Cross
Section
• Radar cross section/seeker training
• Full azimuth and elevation sweep
• Ship RCS, Effect of sea water
Specialized
Software
• Induction furnace performance
• Electron beam, Magneto-hydrodynamics
• Space antenna, rail gun, Laser, corrosion
RCS of Fighter Aircraft
Ship RCS Polar Plot

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Computational Electromagnetics
Different methods developed for the simulations and their
results and merits
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FVTD Solver
 Current Capabilities and Achievements
 Simulation of Curl equations in resonance region in time
 Parallel solver with largest simulation – 4.2 Billion mesh
 Solution for PEC and Di-electric material
 Custom pre-processor for specific shapes (e.g. air intake, projectiles)
 RCS, nearfield, farfield calculated producing surface current every time instant: Antenna and
RCS applications
 Post-processor with specific CEM features like RCS plots
 ISO Standard CGNS format: highly interoperable
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Dielectric Coated Sphere
 Reference: Michael S. Yeung , Journal of Scientific Computing, Vol. 15, No. 1, 2000
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er=4.0 , Electric size =0.5

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PO/PTD Solver
 Suitable for shaping and design of structures for a range of frequencies
 Ray tracing for shadowing effects
 Shooting and Bouncing Rays (SBR) effect simulated
 Parallied using Open MP and OPENMP
 Integrated pre-processor for surface mesh generation
 Triangles appropriate to wavelength made automatically
 360o deg simulation in azimuth and elevation
 Tabulated discrete points simulated
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RCS of Ogive Geometry
 PO-PTD-SBR method used for simulation for 9.54 GHz incident wave
 Good comparison with variation in the shadow region (due to small values)
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FDTD Solver
 Maxwell-curl eqn in time domain solved on Cartesian mesh
 Dispersion and diffusion free results
 Suitable for simple geometry, simulation of dispersive materials in wave guides
 Customized for wave guides: in-built mesh generator with material properties (complex
permeability & permittivity)
 Highly scalable using MPI, GPUs
 BCs – PEC, PML, excitation port
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Wave Guide
 Electric field along the axis of wave guide
 FDTD Method used for simulation
 Material properties modeled
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FEM Solver
 Solves vector Helmholtz equations
 Suitable for antennas, wave guides, cavity and microwave circuits when domain is finite
 Materials: non-linear and anisotropic including lossy
 Solution mode – Total field formulation both Eigen value and linear equation is
possible
 Boundary conditions – PEC, PML, excitation port
 Validated for wave guides
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Scattering Parameters Using FEM
 Computation of scattering parameters of Radar Absorbing Material (RAM)
 Developed code for estimating effective electrical permittivity and magnetic permeability
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RCS Simulations
Simulation examples of airborne and ship applications
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RCS of Target UAV
 Radar Cross Section (RCS) estimation of pilotless target UAV
 RCS estimation sweep in entire azimuth
 Hot-spots located and reported to the designer
 Scattering estimated in dB and Sqm
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Inputs for Seeker Design
 Flight measurement of yaw, pitch, roll angle tables were converted to azimuth /
elevation table for RCS prediction;
 Helped in mission evaluation
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CAE Software on Grid Computing Network
 Testing of latest grid computing network by running large simulation
 Electromagnetics simulation run for high frequency; good match with known data
 Four billion mesh used for the simulation on generic missile shape
 Good scalability achieved on the machine
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RCS of Missile

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Low RCS Intake Geometry
 Estimation of RCS for aircraft intake geometry
 Custom software to vary the intake shape (cylindrical, S shape etc)
 Mie range scattering predicted in the software; customer did more design iterations
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MagneticFlux

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RADAR Cross Section of Ships
 RCS of Ship at 10 GHz in full azimuth sweep
 PO/PTD/SBR method used with effect of sea water modeled
 Smaller details in the ship modeled and RCS reduced by 70%
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Specialized Software Development
Software development for
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Electron Beam: Custom Software
 Design of complex electrode geometries
 Computation of electro-potential and electron trajectories
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ITER – MHD and Heat Transfer
 Thermal hydraulics & Reactor safety analysis for passive heat removal in liquid breeder
 Prediction of MHD pressure drop & temperature profile in PbLi rectangular channel
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Naturalconvectioninreactor

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Solver for Induction Heating Furnace
 Concentric circular coils to generate magnetic field and eddy currents for heating of
metal in the crucible
 Solver developed to estimate distribution of heat generation and temperature
 2D FVTD technique used for development of custom tool
 Power and current distribution in the furnace as output
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Stripification of Space Antenna Surfaces
 Antenna surface a doubly curved surface; polynomial of order ~ 20
 2D strip generation to cover full surface with no wrinkles
 Marker points generation to match the mould and the strips
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Error colour plotStrips

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Electromagnetic Optimization of Rail Gun
 Design of single and multi-turn rail gun
 Projectile ejection at high Mach numbers due to EM force
 Current concentration seen in parallel rails
 EM & structural design of Rail Gun
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Software for LASER Threat Detection
 Detection of LASER threat and evasive action
 Optimization of placement of sensor location; finds distance and direction of threat
 Effect of attenuation due to atmospheric conditions like temperature and humidity modeled
 Activation of decoy LASER over various reflecting materials
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Galvanic Corrosion: Naval Vessels
 Simulate electric potential & currents for extremely low frequency electromagnetics
 Identifies locations of anodes and cathodes
 Optimize location of sacrificial anodes to delay corrosion (ICCP Optimization)
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Current density on the ship and
induced field on a plane below it

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Team and Closure
Details of the team and consultants and summary of
presentation
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Core Team
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 Prof Gopal Shevare (Chairman) – PhD IIT Bombay with 40+ years research exp
 Expert in MDO, fluid dynamics, numerical methods and simulation product development
 Basant Kumar Gupta (CEO) – Masters IIT Bombay with 16 years experience
 Expert in preliminary design, project management,
 Irshad Khan (COO) – Bachelor Mechanical with 22 years experience
 Expert in mesh generation, drawings, product development and vendor management
 Sumit Jana (Head – Solver Devp) – Masters IIT Kharagpur with 12 years exp
 Expert in parallel solver development for CFD, Electromagnetics and free surface flows
 Suman Mohandas (Head – Software Devp & Visualization) – Bachelors Computer
 Expert in new software development, visualization, parallelization and GUI
 Ten engineers certified by CEMILAC including above

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Consultants and Collaborations
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 MOUs and Collaborations
 Centre for development of advanced computing – HPC usage in Teraflops
 NIT Nagpur – Joint R&D projects in coupled problems (CFD+FEM)
 IIITDM – Joint projects of analysis adding to product development
 Expert Panel (partial)
 Mr. SG Joshi – 40+ years experience in pump design and manufacturing
 Prof S C Lakkad – 45+ years experience in composite design and manufacturing process
 Prof K Sinhamahapatra – 20+ years experience in acoustic prediction
 Mr S Panse and H Ketkar – 35+ year exp in tool room, jigs/fixture design, special projects
 Mr V Kamat – 40+ years experience in hydraulic machine design, fabrication & maintenance
 Mr A Patki – 40+ years experience in space systems for reliability and weight reduction

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Closure
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 Experience of 400+ high tech projects in both strategic and industrial sectors
 Engineers trained in Aerospace grade quality and confidentiality
 Robust engineering software development experience
 Modular code development with high reusability
 Experience of parallelization and cloud computing
 Domain expertise in aforementioned sectors
 Contribution by the engineering team enhanced to design suggestions
 Flexible engagement model
 Fixed cost, Time and Material, Cost plus or models as per problem statement
 Unafraid to take R&D projects – Test Us

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www.zeusnumerix.com
+91 98190 09836
Abhishek Jain
abhishek@zeusnumerix.com
Thank You !

CEM and Radar Cross Section @ Zeus Numerix

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