Introduction to V9

The Fastest, Most Efficient, Cost Effective Way to Go from MCAD to Flow & Thermal Solutions Dynamic image courtesy of

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Upfront CFD Technology Platform

Nine New Features in V9 That Will Speed You Up

The Accelerant™ Solver

– Proprietary CPU Optimization to optimize use of available memory

– 20x (and higher) speed-up for hardest problems

– Even the easiest problems show 20-40% speed up

The V9 Accelerant Solver delivers a fully converged flow & thermal solution for this highly detailed CAD model in less than 45 minutes on a standard Desktop PC.

#1

Accelerant™ Solver -- Example #1

Hydraulic Valve

• 73,000 nodes

• Old Solver:

– 26.0 sec/iteration

• New Solver:

– 18.5 sec/iteration

• 40% speed-up

Accelerant™ Solver – Example #2

Huge heat sink

• 581,000 nodes

• Old Solver:

– 1008.4 sec/iteration

• New Solver:

– 62.25 sec/iteration

• 1600% speed-up

Accelerant™ Solver – Example #3

Serpentine Heat Pipe

• 266,000 nodes

• Old Solver:

– 1200 sec/iteration

• New Solver:

– 60 sec/iteration

• 2000% speed-up

Auto Mesh Sizing

• One of the most commonly asked questions in CAE: “What mesh sizes should I use?”

– Performs topological interrogation of the model

– Assigns mesh sizes based on curvature, gradients, and proximity to neighboring features

– There are three levels of interaction:

• Fully Automatic

• Automatic/Interactive

• Manual

#2

Extrusion Meshing

• Stretches triangular faces into multiple layers of wedge (prism) elements through the length of 3-D parts with a uniform cross section.

• Reduces element count in high aspect-ratio parts

• Improves flow accuracy in models dominated by form drag

#3

Extruded Meshing

Geometry Diagnostics

• Interrogates geometry to identify areas that may cause disrupt mesh sizing, mesh generation, and even solution stability.

– Pre-meshing interrogation of surfaces and edges to identify entities that are relatively extremely small.

– Allows part suppression

– A way to force refinement to improve chances of meshing success

– A way to reduce the effects of small entities on the surrounding mesh.

#4

Rules on Parts

• Intelligently detects MCAD part names within an assembly and automatically assigns volumetric boundary conditions and material properties.

• Boundary conditions include heat generation and total heat generation, both of which can be steady-state, transient or temperature dependent.

• Materials are assigned from CFdesign’scustomizable library of fluids, solids, printed circuit boards, and the newly added two-resistor electronic components.

#5

Forced Convection Automation

• Press ‘GO’ on the Analyze dialog and the analysis will run first as Flow-only until convergence is achieved.

• Flow will then be disabled and heat transfer enabled automatically to deliver a fully coupled forced convection solution.

#6

Internal Fan Velocity Profile Import

• Allows the specification of the velocity profile for an internal fan.

• Provides a mechanism to apply the velocity distribution computed from a detailed rotating region analysis to a simple geometric representation of that fan in a subsequent system-level analysis.

#7

PCB Characterizer

• A simple way to accurately include thermal characteristics of any PCB material within a CFdesign simulation.

• The unique properties of each copper and dielectric (FR-4) layer are specified, allowing conductivities to be computed automatically and applied within the simulation.

• Each characterized PCB can be added to the CFdesign material library for re-use, and can be automatically assigned with new rules on parts functionality.

#8

Two-Resistor Electronic Components

• User supplies Theta JB and Theta JC

• V9 supplies – Board, Junction and Case temperature

– Heat transfer between junction and board

– Heat transfer between junction and case

• Supported chips include– BGA (ball grid array)

– PBGA (plastic ball grid array)

– TBGA (taped ball grid array)

– FC-BGA (flip chip ball grid array)

– QFP (quad flat pack)

– PQFP (plastic quad flat pack)

– NQFP (no-lead quad flat pack)

– SOIC/SOP (small-outline IC/small-outline package)

#9

V9 Simulation Options

Everything under the Sun

Solar Loading

• Determine transient electromagnetic heat transfer from the sun

• Steady state or transient

• Supports radiation throughtransparent media

• Shows shadowing

• Simulation set up is simple

– specify time of year, time of day, and location on the globe using V9 database or by assigning latitude/longitude

Transient, geography-specific solar loading of a security lamp

New Radiation Model

• Expanded functionality and better accuracy

• Uses true view factor to provide a better energy balance when computing radiative heat transfer through transparent media, and to moving solids and surfaces.

Free Motion

• Enable or limit any of the six degrees of freedom

• Apply forces, gravity, initial velocity and rotation then have CFdesign show free movement of solids in any flow.

• Tracks forces and torque

• Detects collisions and records subsequent reactions

• Apply gravity and gravitational acceleration, even designating values different from those on Earth

Chattering valve involving free moving ball in cage

Wall Calculator for Motion Module

• A handy tool to obtain force, torque, as well as other wall quantities for any surface on a moving or rotating object.

• A data table containing the time history of force and torque for moving and rotating objects are produced with every motion analysis.

New Humidity Model

• A temperature based approach rather than the previous enthalpy-based approach improves predictive accuracy and computational stability.

• Primary steps for setting up a humidity analysis:

– Assign humidity boundary conditions to all inlets

– Assign a moist-air property to the flow region

– Select Humidity on the Options_Scalar dialog

Thermostatically Controlled Fans and Blowers

• Use a specified trigger temperature to control a fan or blower within the simulation.

• Fan is turned on/ off automatically as trigger temperature is reached to provide a highly realistic view of full-cycle system performance.

Two New Design Optimization Enablers

V9 delivers its greatest value when used to conduct comprehensive design optimization studies prior to physical prototype testing.

Process Automation Scripting

• A CFdesign expert or traditional CFD user can create a template for casual, even non-technical users

• Automate a large number of similar analyses with varying parameters

• A mechanism for interfacing with CAD tools for complete process automation

• A mechanism for interacting with optimization and data processing tools

A text-based way to drive CFdesign outside of the user interface

Design Review Server

Networked Computers to the Design Review Server

Design Review Server allows a user to compare multiple designs at the same time at their desktop while using the resources of other computers on the network.

Summary

V9 is another major milestone in Upfront CFD

Analysis Sophistication Increases

Solution Speed Dramatically Increases

Ease of Use Increases

Optimization Opportunities