CFD TOPIC HUB · MESHING & WALL TREATMENT
CFD meshing and wall treatment: build a mesh that matches the physics.
Use this topic hub when the engineering answer depends on near-wall resolution, prism-layer design, local mesh quality or whether the mesh is compatible with the turbulence and wall-treatment strategy.
Start from the decision the CFD model has to support.
Meshing is not a single quality number. The useful question is whether the mesh resolves the gradients, walls, interfaces and geometric features that control the quantity of interest.
Use these checks before adding model complexity.
- Choose the near-wall modelling strategy before choosing a target y+.
- Treat first-cell height, prism-layer count, growth and total thickness as one coupled design.
- Localize poor cells and mesh sensitivity where they can influence the engineering result.
Already have a CFD model that behaves incorrectly?
Start from the symptom and follow the Technical Case diagnostic sequence before tuning unrelated solver controls.
Browse Technical Cases →Build the modelling decision from the underlying physics.
Use the guides for definitions, assumptions, workflow design and evidence requirements.
What is y+ in CFD?
Near-wall resolution and first-cell distance
Open resource →ENGINEERING GUIDEPrism Layers in CFD
Layer count, growth rate and boundary-layer coverage
Open resource →ENGINEERING GUIDESTAR-CCM+ Meshing Workflow
Solver-specific geometry-to-volume-mesh workflow
Open resource →ENGINEERING GUIDESTAR-CCM+ Wall Treatment & y+
Connect wall treatment to the solved wall field
Open resource →Diagnose the failure mode when the solved model disagrees.
Technical Cases are organized around symptoms, likely causes, diagnostic order and controlled fixes.
Bad Mesh Quality in CFD
Find where bad cells actually affect the physics
Open resource →TECHNICAL CASEPrism Layers Collapse or Disappear
Diagnose gaps, curvature and layer-control conflicts
Open resource →TECHNICAL CASESolved y+ Misses the Target
Use the solved wall field to guide remeshing
Open resource →TECHNICAL CASETurbulence & Wall-Treatment Mismatch
Align RANS, wall treatment, prisms and y+
Open resource →Challenge the CFD with transparent engineering checks.
Independent calculations help reveal whether the problem is in the physics, inputs, numerical resolution or interpretation.
y+ & First Cell Height Calculator
Estimate the near-wall length scale
Open resource →ENGINEERING TOOLPrism Layer Calculator
Design a controlled prism stack
Open resource →ENGINEERING TOOLCFD Mesh Advisor
Structure refinement and mesh-QA decisions
Open resource →ENGINEERING TOOLWall Treatment Advisor
Choose a consistent starting strategy
Open resource →Continue with the same engineering context.
Move into structured training when you need the complete methodology, or engineering support when the answer depends on the actual project.
Connect adjacent modelling decisions.
Complex CFD problems often cross more than one topic cluster. Continue into the governing issue rather than searching by software menu alone.
Go deeper on a question engineers search when the model becomes uncertain.
These focused resources extend this topic cluster with one decision guide and one symptom-led Technical Case.
CFD Mesh Quality Metrics
Interpret skewness, non-orthogonality, aspect ratio, size transitions and local cell quality in the context of the physics and solver.
Read guide →TECHNICAL CASEPrism Stack Too Thin for the Boundary Layer
Diagnose a prism stack that achieves first-cell y+ but ends while important wall-normal gradients are still strong.
Open diagnostic case →