# 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 Unit
Type Spacing control methodology -
Assigned surfaces Target surfaces for spacing control -

# 🔍 Detailed Descriptions

# Type

Specifies the methodology for spacing control.

  • Default: None (required)
  • Available Options:
    • projected: Projects spacing from adjacent volumes
    • unchanged: Preserves existing surface mesh
  • Notes: Selection determines how mesh spacing is controlled

# Assigned surfaces

Identifies the surfaces where spacing control will be applied.

  • Default: None (required)
  • Example: [interface_surface, transition_surface]
  • Notes: Must reference valid surface entities in the geometry

💡 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",
    refinement_type="projected",
    faces=[interface_surface]
)

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

← Uniform Refinement →