1. Create CAD-associative Fluid
Domains Within Complex
Assemblies
Remi Duquette, Director
MAYA Heat Transfer Technologies Ltd.
remi.duquette@mayahtt.com
www.mayahtt.com
2.
3. NX powered by Synchronous Technology
Revolutionary Toolset for the CAE Users
Provides an intuitive and direct approach to design… it is
simple, fast, and reliable
Adds a new History‐Free mode
– Market leading functionality
– Increased capacity for “what if” design studies, especially in
the context of CAE workflows
Super Easy CAD changes – with minimal learning curve
Fluid domain generation workflow breakthrough for CFD
analysis with NX Flow or NX Electronic Systems Cooling
Best set of design tools
– Powerful tool for CAE and Manufacturing Engineers
– Works equally well on imported and native geometry
– Frees you from the limitations of traditional history based
modelers
– Preserves your investment in history based modeling
– Users choose best approach to get the job done
This is the revolution in CAD/CAE workflows you were waiting for!
Slide 3
4. Introduction to Synchronous Technology
History‐Free, Feature‐Based Modeling
– Simultaneously synchronizes geometry and rules
through a new decision‐making inference engine
Accelerates innovation in four key areas
– Design intent capture
– Design changes
• Especially for CAE/CAM users
– Multi‐CAD data re‐use
– Ease of use
• Especially for CAE/CAM users
Slide 4
5. Need to make important “what if” CAD changes?
Leverage NX powered by Synchronous Technology
If CAD geometry has features, you
can modify the model in it’s
current state without regard for
how the model was constructed
(ie you don’t need to know any of
the CAD geometry dependencies)
If CAD geometry has no features
(“dumb” imported geometry), you
“What if” scenario for CAE specialist
can edit the geometry directly
Slide 5
6. NX powered by Synchronous Technology
Modification of the model in it’s current state without regard for how
the model was constructed…that is what the CAE user needs!
Intent is what you intend to do now
Slide 6
7. Active & Smart Selection
Simply select a hole
face and start point…
two clicks … and edit
the dimension
The model is updated as Active Selection
expected, and the geometric automatically recognizes
relationships are maintained geometric relationships …
coaxial, concentric, and
tangent in this case
Slide 7
10. Synchronous Technology for Fluid
Domain Creation
Revolutionary Toolset for the NX Flow &
NX Electronic Systems Cooling Users
Most electronic systems cooling problems and many
CFD problems require generation of the 3D
geometry representing the fluid domain
Once the 3D fluid domain geometry created, the
automatic fluid domain mesher can be used:
Driven from the 3D geometry
Detects internal flow blockage geometry
Automatically meshed with tetrahedral, wedge, and
pyramid elements
Is usually bounded by walls, vents, and/or fans, and
other openings
Creates a boundary layer mesh at walls where needed
Synchronous Technology generates the fluid domain
geometry required…
Delete Face removes unwanted external surfaces
Seals up holes, vents, and/or fan openings with
little/no user intervention
Automatically creates continuous 3D geometry for the
fluid domain!
Slide 10
11. Synchronous Technology for
Fluid Domain Creation
Example: Air Intake Manifold
k s
c lic
in in 4
a
id dom
c t flu
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Slide 11
23. Other Fluid Domain Creation Techniques
1. Fill it with Cuboids (Space Finder Method…)
2. Assembly Wrapping Technique
3. Extract Faces & Patch Holes
4. Manual technique: create a large block and carve out
the fluid domain by multiple boolean operations and
extrude/cut operations
Slide 23
24. [1] Fill it with Cuboids (Space Finder…)
This technique is typically used for quick conceptual CFD simulations. The “stepped” fluid domain geometry
created is a crude approximation and is unreliable for curved shapes (unless you use extremely small cubes and/or
take the time to locally refine your mesh…local small cubes tend to lead to very long CFD solve time unnecessarily)
Slide 24
