Fidelity Pointwise: Fix CFD Geometry Gaps with Offset + Interpolate

In this TutorialTuesday, we walk through a practical geometry-repair workflow in Fidelity Pointwise for handling disjointed CAD surfaces and large gaps, common blockers in CFD preprocessing.

This session demonstrates how to use offset (zero-distance) and interpolate operations to reconstruct missing topology and generate a watertight model suitable for meshing.

Problem Context
- Disconnected wing and fuselage geometry (Araoh glider model)
- Missing hub curves between components
- Non-watertight topology preventing CFD mesh generation

What You’ll Learn
- How to derive curves from database boundaries using offset = 0
- Why offset operates on a single entity—and how to scale via Glyph scripting
- Automating multi-boundary offsets with a custom script (via Cadence support)
- Using interpolate to generate bridging surfaces between disjoint geometries
- Applying Assisted Model Assembly to validate topology
- Eliminating lamina loops with Trim by Surfaces
- Finalizing a clean, watertight geometry for CFD workflows

Key Techniques Covered
- Boundary extraction via offset
- Multi-entity automation using Glyph scripts
- Surface reconstruction via interpolation
- Topology cleanup (trim, imprint, loop removal)
- Watertight model validation

Why This Matters
Robust geometry preparation is critical for stable and accurate CFD simulations. This workflow provides a repeatable method to:
- Repair gaps in imported CAD
- Fuse disjointed components
- Ensure solver-ready watertightness

To obtain the multi-boundary offset script, contact Cadence support via the Cadence Ask portal.

Chapters
00:00 Introduction
00:30 Problem setup: disjoint geometry
01:10 Offset from database boundaries
02:10 Automating with Glyph script
03:20 Interpolating surfaces
04:30 Model assembly & validation
05:30 Trimming and final cleanup
06:30 Watertight verification

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Видео Fidelity Pointwise: Fix CFD Geometry Gaps with Offset + Interpolate канала Cadence CFD