floefd 16 what’s new - efd.com.tw

FloEFD 16What’s NewAlexey KharitonovichProduct Manager

Tatiana TrebunskikhProduct Manager

2© 2016 Mentor Graphics Corp. Company Confidentialwww.mentor.comAK, TT, FloEFD 16 What’s New, 2016

FloEFD 16 Enhancements Phase Change for Refrigerants

Flows of refrigerants with liquid to gas (cavitation/boiling) and gas to liquid (condensation) phase change (e.g. refrigerant flows in heat exchanger or air conditioning systems) can now be simulated.

Broadband Noise EstimationA postprocessing parameter to estimate Acoustic Power Level generated by isotropic turbulence in accordance with Proudman’s definition.

Volume Source ImportCoordinate based volume source import of heat flux and temperature. Can be used for irradiance input.

Ray ImportDefine radiation source by importing Ray information such as location, direction, energy, wavelength (supported format is ASAP .dis). Beta feature. Check Notes for activation.


FloEFD 16 Enhancements Widgets

Display XY plot and Goals in graphics area (updated with time )

Surface Plot Speed UpAccelerating creation of surface plot with “Use CAD Geometry” mode enabled (requires recalculation in v16 with “Results processing Speed-Up Data” option enabled)

Improved goal convergence analysisGoal convergence is now analyzed when the achieved number of travels equals 2 analysis intervals.

Rays to stop at reached surface While displaying rays (for the Monte Carlo radiation model) you can optionally end rays at the surfaces they reach to hide reflected rays. Available in the LED/Lighting module.

0.2 = 2*0.1 – start to check goals

Goals converged. Calculation stops


FloEFD for Solid Edge Currently missing functionality

— Geometry change in Parametric Study— Linked conditions from components


Absorption of Water Vapor in Plastics

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Steam Mass in Solid vs Temperature

Steam Mass in Solid vs Humidity


Absorption of Water Vapor in Plastics Solid material can absorb and release water vapor which is essential to consider

in condensation, fluid film, moisture analyses— Requires specifying Diffusion coefficients of water vapor (can be Temperature dependent) as

additional property of solid medium— Uses Equilibrium concentration which can be defined via Solubility or Concentration ratio

(Y) for humid air and water film— Pre-defined Polycarbonate has absorption properties

Water sorption: Experimental [1] weight gain (m/msat) data compared to FloEFD simulation results. Here z – thickness of the piece.

[1] Jesse E.Galloway, Barry M.Miles. Moisture Absorption and Desorption Predictions for Plastic Ball Grid Array Packages.

)exp(0 RTEDD D][ CD

tC )(TYC solid

eqouteq


Linked Conditions from Components Re-use conditions (i.e. material settings, heat sources, etc.) from other

component’s projects of an assembly.— By default conditions are added linked, so changing settings in a component’s

project updates the main assembly project — You can move condition to the assembly project to break the link

Global GoalsPoint GoalsSurface GoalsVolume GoalsEquation GoalsBoundary ConditionInitial ConditionPorous MediumSolid MaterialsSurface SourceVolume SourceRadiative SourceRadiation SourceFanHeat SinkRotating regionFluid subdomainContact resistanceTECPerforated PlateElectrical conditionsHeat pipeThermal JointPCBFilmsLED2R


Linked Conditions from Components

2. Go to Tools, Add from Components

1. Create project in the component

3. Happy with conditions added

Multi-level. View. Copy to project


Transient Explorer Selected parameters can be saved instead of saving full results at specified time

moments to reduce the transient result data size— Sophisticated (wavelet based) compression algorithm can achieve 10x compression than zip.

Example: For a headlight, 10 parameters are saved every 2nd iteration, total size = 3 Gb.

— Compression factor decreased with increasing variability of the field, number of cells and frequent saving of intermediate full results


Transient Explorer Instant transient data access for selected parameters is available via Transient

Explorer Mode— To activate: Results, Transient Explorer— Supported for Cut plots, Surface plots (exc. 3D Plot, and gradient vectors),

Probes, XY Plots, Goals (shown as widgets), Min/Max table— Adjusting slider’s start and finish time to focus on a particular time interval— Linear interpolation between time moments can be optionally enabled


Radiation Source:Intensity Dependent on Angle, Spectrum For directional sources Radiation Intensity distribution

(called Pattern) can now be defined as a function of angle— Axisymmetric to the main direction defined as either normal to face

or vector

Radiation Spectrum can now be set for a radiation source (both diffusive and directional)

— Ability to define spectrum for LED source— Ability to model radiation from a laser diodes


Radiation based SAR In addition of the current SAR in the fluid area the refinement in solid due

to radiation criteria is added— Solid cell refinement occurs in cells where either incident radiant flux is high or incident

number of rays is large— This allows to automatically refine mesh in areas of hot spots caused by focusing on lens.

Therefore it leads to more accurate prediction of the maximum temperature in the spot— Monte Carlo radiation model only

Hot spot is not refined:T max = 180 C

Hot spot is refined:T max = 450 C


Enhanced LED Non-linear dependency of the voltage, the radiant flux and the

luminous flux on the temperature (as Temperature Table) is added in addition to the current linear dependency (via sensitivity factor)


Enhanced LED LED’s Forward Current can be dependent on goal (to simulate temperature

sensor driven LED) LED Custom Callout – customize callout output parameters

Select Output Parameters


Network Assembly Network Assembly allows to model N-resistor IC package specifying thermal

capacitance, power as well as thermal resistance between nodes


Mesh Settings. New Channel Refinement New additional option to ensure uniform mesh in channels of different height.

Standard (old) Channel Refinement ensures specified Number of cells across the channel using whatever refinement is needed.

This may lead to a non uniform mesh in channels with coarser cells in the middle

The new option ensures specified refinement level across the channel regardless of number of cells to be generated.

This makes uniform mesh in the channels of specified height.

You can set different refinement levels for different heights as a table function.

0.07 m0.1 m


Design of Experiments and Optimization

Multi-Parameter optimization added to Design of Experiments Parametric Study mode

— Determine the optimal design based on Design of Experiments results using the Response Surface Optimization method.

— Definition of Objective Function to Minimize,Maximize or search for a specific Target value.

— Weight factors and Constraints allow control ofmultiple parameters involved in the optimization process.

— Response Surface Viewer to inspect parameter dependencies easily and quickly.


External Optimizer

A new mode in Parametric Study: External Optimizer— Allows to control FloEFD from external optimization tools (such as

iSight, modeFrontier, Optimus, HyperStudy, optisLang) to perform multi-parametric optimization

— Use text based data exchange and command-linedriven executable to run FloEFD


UVGI (Ultraviolet Germicidal Irradiation) UVGI allows to predict irradiation germicidal efficiency and the effective

germicidal dose in water or air.

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Apparatus.SLDASM [exp E [Default]]

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VG Av Effective Germicidal DoseExposure Chamber

floefd 16 what’s new - efd.com.tw

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