fixed_bc.hpp File Reference

Fixed boundary condition with smooth transition. More...

#include "openpfc/core/types.hpp"
#include "openpfc/field/operations.hpp"
#include "openpfc/field_modifier.hpp"

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Classes
class	pfc::FixedBC

Detailed Description

Fixed boundary condition with smooth transition.

This file defines the FixedBC class, which enforces fixed values at domain boundaries with a smooth transition region. The boundary condition:

• Sets field values to specified low/high values at domain edges
• Uses smooth exponential transition to avoid sharp discontinuities
• Configurable transition width and strength

Useful for:

• Dirichlet boundary conditions
• Fixed-wall simulations
• Controlled boundary reservoirs

Usage:

auto bc = std::make_unique<pfc::FixedBC>(0.0, 1.0);  // low, high values
bc->set_field_name("density");
simulator.add_boundary_condition(std::move(bc));

See also

field_modifier.hpp for base class

moving_bc.hpp for time-dependent boundary condition

Author

OpenPFC Contributors

Date

2025