cl_JcFunction.hpp File Reference

Base class hierarchy for critical current density (Jc) and n-value functions. More...

#include "typedefs.hpp"
#include "cl_Bitset.hpp"

Include dependency graph for cl_JcFunction.hpp:

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Classes
class	belfem::material::JcFunction
	Base class for critical current density (Jc) and n-value functions. More...

Namespaces
namespace	belfem
	USER GUIDES:
namespace	belfem::material

Typedefs
typedef Bitset< static_cast< uint >(JcParameter::UNDEFINED) >	belfem::material::JcDependency
	Bitset for tracking Jc function dependencies.

Enumerations
enum class	belfem::material::JcParameter { belfem::material::normB = 1 , belfem::material::angleNxB = 2 , belfem::material::T = 3 , belfem::material::UNDEFINED = 4 }
	Parameters that Jc (or n) can depend on. More...

Detailed Description

Base class hierarchy for critical current density (Jc) and n-value functions.

This file defines the abstract base class JcFunction and its parameter system for representing field-, angle-, and temperature-dependent properties in high-temperature superconductors (HTS).

Usage

JcFunction objects are created by MaterialFactory and assigned to Material objects. The Material takes ownership and is responsible for deletion:

// Create analytical Jc function (modified Kim model)
JcFunction* jc = factory.create_jc_function(
    1e9,   // Jc0 [A/m²]
    5.0,   // B0 [T]
    0.5,   // k² anisotropy
    2.0    // α exponent
);
material->set_jc_function(jc);  // Material takes ownership
 
// Or create from database file ( same creator for jc and n tables )
JcFunction* n_value = factory.create_jc_function(
    "path/to/n_value_data.h5", "n"
);
material->set_n_function(n_value);  // Material takes ownership

Derived Classes

• JcFunctionModifiedKim: Analytical model with field and angle dependence
• JcFunctionDatabase: Lookup table with field, angle, and temperature dependence

Important Notes

1. OWNERSHIP: Material takes ownership - do NOT delete manually
2. UNITS: Jc in [A/m²], B in [T], angle in [rad], T in [K]
3. Same class used for both Jc and n-value (identical dependencies)
4. Constant values stored directly in Material, not as JcFunction objects

Dependencies:

• normB: Magnitude of magnetic field [T]
• angleNxB: Angle between surface normal and field [rad]
• T: Temperature [K]