FloEFD 16 What s New. Alexey Kharitonovich Product Manager. Tatiana Trebunskikh Product Manager

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1 FloEFD 16 What s New Alexey Kharitonovich Product Manager Tatiana Trebunskikh Product Manager

2 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 Estimation A postprocessing parameter to estimate Acoustic Power Level generated by isotropic turbulence in accordance with Proudman s definition. Volume Source Import Coordinate based volume source import of heat flux and temperature. Can be used for irradiance input. Ray Import Define radiation source by importing Ray information such as location, direction, energy, wavelength (supported format is ASAP.dis). Beta feature. Check Notes for activation. 2

3 FloEFD 16 Enhancements Widgets Display XY plot and Goals in graphics area (updated with time ) Surface Plot Speed Up Accelerating 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 analysis Goal 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 3

4 FloEFD for Solid Edge Currently missing functionality Geometry change in Parametric Study Linked conditions from components 4

5 Absorption of Water Vapor in Plastics Steam Mass in Solid vs Temperature Steam Mass in Solid [kg] C (Theory) 0 C 20 C (Theory) 20 C 40 C (Theory) 40 C 60 C (Theory) 60 C 80 C (Theory) 80 C 100 C (Theory) 100 C time [sec] 2.5E Steam Mass in Solid [kg] 0% (Theory) 0% 20% (Theory) 20% 1.5E 07 40% (Theory) 40% 60% (Theory) % 80% (Theory) 80% 5E % (Theory) 100% time [sec] Steam Mass in Solid vs Humidity 5

6 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 C t [ D C] D D 0 ED exp( RT ) C eq out Y solid eq (T) Water sorption: Experimental [1] weight gain (m/m sat ) 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. 6

7 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 Goals Point Goals Surface Goals Volume Goals Equation Goals Boundary Condition Initial Condition Porous Medium Solid Materials Surface Source Volume Source Radiative Source Radiation Source Fan Heat Sink Rotating region Fluid subdomain Contact resistance TEC Perforated Plate Electrical conditions Heat pipe Thermal Joint PCB Films LED 2R 7

8 Linked Conditions from Components 1. Create project in the component Multi-level. View. Copy to project 2. Go to Tools, Add from Components 3. Happy with conditions added 8

9 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 2 nd iteration, total size = 3 Gb. Compression factor decreased with increasing variability of the field, number of cells and frequent saving of intermediate full results 9

10 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 10

11 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 11

12 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 12

13 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) 13

14 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 14

15 Network Assembly Network Assembly allows to model N-resistor IC package specifying thermal capacitance, power as well as thermal resistance between nodes 15

16 Mesh Settings. New Channel Refinement New additional option to ensure uniform mesh in channels of different height. 0.1 m 0.07 m 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. 16

17 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 of multiple parameters involved in the optimization process. Response Surface Viewer to inspect parameter dependencies easily and quickly. 17

18 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 multiparametric optimization Use text based data exchange and command-line driven executable to run FloEFD 18

19 UVGI (Ultraviolet Germicidal Irradiation) UVGI allows to predict irradiation germicidal efficiency and the effective germicidal dose in water or air. 2 Apparatus.SLDASM [exp E [Default]] 1.8 SG Av Effective Germicidal Dose Outlet 1.6 VG Av Effective Germicidal Dose Exposure Chamber Effective Germicidal Dose [J/m^2] Physical time [s] 19

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