Boundary Conditions

This section covers the various boundary conditions available in Flow360.

Boundary conditions specify how the fluid behaves at the boundaries of the simulation domain. Boundaries conditions define the physical and mathematical conditions at the enclosed faces of the computational domain. Flow360 provides a comprehensive set of boundary conditions to support various simulation scenarios.

Overview of Boundary Conditions

Boundary Condition	Description	Key Parameters
Wall	Solid surface where fluid cannot penetrate	Wall Motion, Thermal Condition, Wall Function, Roughness Height
Freestream	Far-field condition with uniform flow	Mach Number, Angle of Attack, Sideslip Angle
Inflow	Boundary where flow enters the domain	Velocity Profile, Total Pressure, Flow Direction
Outflow	Boundary where flow exits the domain	Static Pressure, Mass Flow Rate, Backflow Treatment
Periodic	Repeating boundary condition for cyclic geometries	Rotation Angle, Translation Vector
Symmetry	Boundary that enforces symmetry of the solution	Symmetry Plane
Slip Wall	Wall with zero normal velocity but allows tangential flow	-

Additionally, Turbulence Quantities are used to specify turbulence parameters at all types of boundaries, such as Turbulence Intensity, Eddy Viscosity Ratio, Length Scale, etc.

Click on each boundary condition type to see detailed documentation including available parameters, descriptions, usage tips, and example configurations.