Passive Spacing

Passive Spacing#

Passive spacing provides indirect control over mesh behavior without explicit refinement specification, enabling smooth transitions between different mesh regions and maintaining mesh continuity across interfaces.

Available Options#

Option

Description

Type

Spacing control methodology

Assigned surfaces

Target surfaces for spacing control

Detailed Descriptions#

Type#

Specifies the methodology for spacing control.

  • Required

  • Available options:

    • projected: Projects spacing from adjacent volumes.

    • unchanged: Preserves existing surface mesh.

Note: Selection determines how mesh spacing is controlled.

Assigned surfaces#

Identifies the surfaces where spacing control will be applied.

  • Required

Notes:

  • Must reference valid surface entities in the geometry.

  • Assign the boundaries by selecting from the list using the + button or select graphically in the viewer region.

💡 Tips

  • Use projected spacing for interface regions between different mesh zones

  • Apply unchanged spacing where surface mesh quality is already optimal

  • Consider geometric complexity when selecting spacing type

  • Ensure compatibility with adjacent refinement regions

  • Balance mesh quality with computational efficiency

❓ Frequently Asked Questions

  • When should I use projected vs. unchanged spacing?

    Use projected for interface regions requiring smooth transitions, and unchanged when existing surface mesh quality is satisfactory.

  • How does passive spacing interact with other refinements?

    Passive spacing operates independently of other refinements, focusing on maintaining mesh continuity and quality.

🐍 Python Example Usage

 
from flow360 import PassiveSpacing

# Projected spacing for interface region
interface_spacing = PassiveSpacing(
    name="interface_region",
    type="projected",
    faces=[interface_surface]
)

# Unchanged spacing for optimized surface
preserved_spacing = PassiveSpacing(
    name="optimized_surface",
    type="unchanged",
    faces=[optimized_surface]
)
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