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2 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
IMPROVED TRANSIENT
3 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
Speed up Transient Solver
New transient solver allows for using a bigger time step
Looping over iteration is stopped when maximum number of iteration is achieved, or all normalized residuals for momentum, mass and energy achieved a predefined level.
3
Default
Max number of iterations 25
Normalized residuals for mass 0.0015
Normalized residuals for momentum 0.0008
Normalized residuals for energy 0.0008
0
5
10
15
20
25
0 5 10 15 20
Nu
mb
er
of
Nes
ted
Iter
atio
ns
[ ]
Iterations [ ]
dt=1.5 s (with nested iterations)
Time step,
s Nested
iterations Solver Time,
min Error,
%
3 - 200 0.5
50 - 11 4.7
50 10 25 0.4
4 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
Improved accuracy of highly transient pressure-dominated tasks
Working fluid:
Water as a compressible liquid
Initial conditions:
Pressure = 101325 Pa
Temperature = 293.2 K
Time step = 2e-6 s
4
New transient solver allows for calculating such tasks as filling/evacuating of a tank, water hammer
Working fluid:
Nitrogen
Initial conditions:
Pressure = 1 atm
Temperature = 293.2 K
Finish condition:
Pressure inside the tank = 100 atm
0
20
40
60
80
100
120
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
Stat
ic P
ress
ure
[at
m]
Physical time [s]
Averaged Static Pressure in the tank
5 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
New Transient Solver - Limitations
New transient solver is activated by the Nested iteration option
In version 15.0, the new solver doesn’t support — Rotation (Sliding Mesh, Circumferential averaging) — Condensation, humidity, steam, real gases — Cavitation — High Mach number
5
6 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
Calculation Control
Time-averaged parameters
— It is now possible to calculate time averaged parameters – flow field averaged over the specified period, e.g. over the rotation period
Improved Time-Step Definition
— Manual and automatic definition for the table
— Exponential and tangential curve
6
7 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
ELECTRONICS COOLING
8 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
FloEFD can now import EDA geometry
— Supports Standalone, CATIA, NX, Creo
— EDA Bridge to import geometry data including copper traces and vias (no materials, power list)
EDA Import
9 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
Improved Two Resistor
No need to split two resistor into 2 bodies
— Much easy to specify the two resistor compact model
— Saves time to set up significantly
— The true compact model is less mesh sensitive
FloEFD 14 FloEFD 15
10 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
RADIATION & LIGHTING
11 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
Ray Visualization (Monte Carlo only)
— A new feature to display trajectory of rays
— Essential to study impact of heat and radiation sources
Radiation
Refractive index dependent on Wavelength, Temperature
— Improved accuracy in case specific materials are used
12 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
RESULTS VISUALIZATION
13 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
Mirror Results
— Graphical mirror of results for symmetry analysis
— Cut plots and Surface plots only
Improved Export Results
— Export to Abaqus
— Export Porous Matrix Temperature
— Export of transient results
Results Processing
Abaqus FloEFD
14 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
Filter and Sort goals in Monitor
— Filter by first letters
— Sort by Name, Unit, Type
Display Porous Matrix Parameters
— Porous Matrix Volumetric HTC
— Porous Matrix Heat Flux (at matrix/solid interface)
— Porous Matrix Heat Generation Rate
Results Processing
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0 0.5 1 1.5 2
Poro
us
Mat
rix
Vo
lum
etri
c H
eat
Tran
sfer
Co
effi
cien
t [W
/m^3
/K]
Velocity [m/s]
Theory
FloEFD Calculation
15 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
CALCULATION MANAGER
16 © 2015 Mentor Graphics Corp. Company Confidential
www.mentor.com AK, FloEFD 15 What’s New, 2015
Improved Calculation Manager
Improved Batch Run
— Close CAD when using Batch Run
— Collects geometry for all projects and then Close CAD to release its license without waiting for the last project in the queue to be processed
Calculation Manager
— Displays currently running and awaiting projects
— Open Monitor from the Manager for a project running in the background
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