numenGo|Fl overview

numenGo|FL
Generic thermofluid solution
for system simulation
© 2012 numenGo | www.numengo.com 1/17

numenGo
● Thermal Fluids modeling and simulation specialists
● Our Vision
● Capitalize modeling know-how in evolutive, generic, platform-independant
libraries
APPLICATIVE
SOLUTIONS
Business Oriented Library
numenGo | FFC
Cryogenics
numenGo|FL
numenGo | MPS
etc..
SIMULATION PLATFORM
Propulsion
YOUR expertise
OUR expertise
THEIR expertise

numenGo|FL
● Contains high level components for thermofluid systems modelling and
simulation
● create physical models of complete thermofluid systems assembling basic physcial
phenomena
● To be used in a simulation environment
● Available for SimulationX®, LMS.Imagine.Lab.Amesim®, Simulink®, Python
● Simulate the system dynamic behaviour and optimize its control
SimulationX is a registred trademark of ITI Gmbh
LMS.Imagine.Lab.Amesim is a registered trademark of LMS Intl
Simulink is a registered trademark of The Mathworks

Introduction
● System simulation
● Based on principles of 1D simulation
● Flow generally supposed to be 1D
● State of fluid is homogeneous in a control volume
● Velocity is neglected in volumes
● In 2-phase, liquid/vapour equilibrium
● Multiport approach
● Components are connected by single ports
● Physical ports exchange energy
● Signal ports for control and command laws
● Dynamic response of the complete system
● Dynamic behaviour of the physical system and its control

Introduction
● Application areas
● Heat machines
● Cooling systems
● Plant modelling
● Air conditionning
● Cryogenics
● Space propulsion
● Fuel cells
● ...

FL overview – media definition
● FL deals with all state of matter
● Liquid
● Gas (perfect and real gas)
● Two-phase (pure fluid and mixtures)
● Solid
● Mixture (ideal and real mixtures)
● Advanced fluid properties calculation
● Based on numenGo|MPS, Media Property Server, optimized for system
simulation requirements
● From simple descriptions to most accurate state of the art descriptions (ie
fundamental equation of state of Helmoltz, Extended Corresponding states...)
● Extensive and scalable database
● ~100 two-phase media
● >3000 simple media

FL overview - sources
● To define limit conditions
● Thermosources
● To define a state
● Ex: pressure, temperature conditions
● Any thermodynamic variable can be used
● Mass or molar basis
● Flow sources
● To impose a mass, molar, volumetric flow
● Heat sources
● To impose a heat flux

FL overview – mass transfer
● Flow equations
● Incompressible, perfect gas compressible, real fluid compressible
● Cavitation, sonic blocking
● Flow resistance models
● Flexible setting of pressure drop coefficients
● K, Cq, Kv, Cv, 2-K, Crane, tables
● Two phase flow
● Slip-Ratio correlations
● Two-phase pressure drop correlations
● Homogeneous
● Separated flow

● Singular pressure drops
● Generic orifices and valves
● Flexible geometry definition
● Predefined pressure drop correlation
● Bends
● Elbows
● Reducer, expander
● Filters
● Tee junctions
● Porous media
● Advanced flow and heat exchange models

● Pipes
● Distributed models
● Dynamic discretization
● Inertial effects
● Convective heat exchange

FL overview – control volumes
● Mass, energy, species balance
● Fluid volumes
● Accumulator
● Thermal capacity
● Volume can change with time when connected to pistons
● A specific phase can be extracted at one port

FL overview – heat transfer
● Generic heat exchange
● Convection, conduction, contact, radiation
● Advanced boiling and condensation models
● Unique heat exchange mapping system
● When using discretized models
● Build easily complex heat exchangers

● Diffusion in mixtures
● Binary diffusion coefficients
● User defined coefficients matrix
● Automatic estimation
● Fuller, Schettler and Giddings
● Effective diffusion coeffiients from Wilke formual
● Diffusion molar flows according to Fick's law

FL overview – sensors
● For inspection and control
● Fluid properties
● Measure any property
● Flow and heat variables
● Mass flow rate, molar flow rate, enthalpy flow rate

FL overview – machines
● Fluid and mechanical subsystems interactions
● Pistons
● Variable volumes and mechanical feedback
● Pumps/Compressors
● Fixed displacement, volumetric, centrifugal...
● Turbo expanders

FL overview - licenses
● FL available with 3 licenses
● FL1 : single phase (liquid, gas, solid) and ideal mixtures
● FL2 : extended with two-phase pure fluids capabilities
● FL3 : extended with real mixtures and two-phase mixtures
● Business Oriented Add-ons
● Moist Air, Heat Exchanger, Air Conditioning, Propulsion, etc...
● Available simulation platforms
● Excel, Matlab, Python interfaces
● Script recurrent calculations
● Sizing, parameter estimation, sensitivity analysis

FL overview
● Best-in-class thermofluid solution
● Highly polymorphic and flexible
● Scalable model database
● Extensive documentation with demos
and tutorials
● Available for most-used scientific
environments
● Reusable along all the calculation chain

numenGo|Fl overview

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