Create CAD-associative Fluid Domains Within Complex Assemblies

Remi Duquette, DirectorMAYA Heat Transfer Technologies Ltd.remi.duquette@mayahtt.comwww.mayahtt.com

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NX powered by Synchronous TechnologyRevolutionary 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!

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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

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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 can edit the geometry directly “What if” scenario for CAE specialist

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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

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Active & Smart Selection

The model is updated as expected, and the geometric relationships are maintained

Simply select a hole face and start point…two clicks … and edit the dimension

Active Selection automatically recognizes geometric relationships …coaxial, concentric, and  tangent in this case

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Re‐use portions of models without having to manually segregate and remove parameters, or export and import

Functional design change with or without features

Copy and paste geometry between files

– Cut Face – detach face set and heal wound

– Copy Face – copy to buffer for reuse

– Paste Face – attach buffer 

– Intelligent “add” and “subtract” attributes on buffer for subsequent paste

– Intelligent extension of buffer faces and target faces

Scrapbook Modeling

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Synchronous Technology for Fluid Domain CreationRevolutionary 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 geometryDetects internal flow blockage geometryAutomatically meshed with tetrahedral, wedge, and pyramid elementsIs usually bounded by walls, vents, and/or fans, and other openingsCreates a boundary layer mesh at walls where needed

Synchronous Technology generates the fluid domaingeometry required…

Delete Face removes unwanted external surfacesSeals up holes, vents, and/or fan openings with little/no user interventionAutomatically creates continuous 3D geometry for the fluid domain!

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Synchronous Technology for Fluid Domain CreationExample: Air Intake Manifold

Perfect fluid domain in 4 clicks

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Synchronous Technology for Fluid Domain CreationExample: Air Intake Manifold – Demo

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Synchronous Technology for Fluid Domain CreationAir Intake Manifold – Temperature mapping Results

NX Nastran – Mapped Temperature Boundary Condition

NX Flow / NX Thermal Solid Temperature Results

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Synchronous Technology for Fluid Domain CreationExample: Thermal Imaging Camera

Perfect fluid domain in 12 clicks

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y gyDomain CreationExample: Thermal Imaging Camera –Demo

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Synchronous Technology for Fluid Domain CreationThermal Imaging Camera –Air Streamlines & Temperature Results

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Synchronous Technology for Fluid Domain CreationExample: Industrial Blower

Perfect fluid domain in ~12 clicks(including RFR partition)

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Synchronous Technology for Fluid Domain CreationExample: Industrial Blower – Demo

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Synchronous Technology for Fluid Domain CreationIndustrial Blower – Air Streamlines Results

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Synchronous Technology for Fluid Domain CreationExample: Automotive Fuse Box

Perfect fluid domain in 5 clicks

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Synchronous Technology for Fluid Domain CreationExample: Automotive Fuse Box – Demo

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Synchronous Technology for Fluid Domain CreationAutomotive Fuse Box –Air Streamlines & Temperature Results

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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

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[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) 

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[2] Assembly Wrapping Technique

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[3] Extract Faces & Patch Holes

For more information, please contact us:info@mayahtt.comwww.mayahtt.comRemi Duquette, Directorremi.duquette@mayahtt.comMAYA Heat Transfer Technologies Ltd.