UJ Scheme

Kernel(zeta, g, dgdr, g_dgdr, EXAFMM_P2P, EXAFMM_L2P)

Arguments

• zeta::Function : Basis function zeta(r).
• g::Function : Regularizing function g(r).
• dgdr::Function : Derivative of g(r).
• g_dgdr::Function : Efficient evaluation of g and dgdr.
• EXAFMM_P2P::Int : Flag for the ExaFMM P2P function to call.
• EXAFMM_L2P::Int : Flag for the ExaFMM L2P function to call.

UJ_direct(pfield)

Calculates the velocity and Jacobian that the field exerts on itself by direct particle-to-particle interaction, saving U and J on the particles.

NOTE: This method accumulates the calculation on the properties U and J of every particle without previously emptying those properties.

UJ_direct(source, target)

Calculates the velocity and Jacobian that the field source exerts on every particle of field target, saving U and J on the particles.

NOTE: This method accumulates the calculation on the properties U and J of every particle without previously emptying those properties.

UJ_fmm(pfield)

Calculates the velocity and Jacobian that the field exerts on itself through a fast-multipole approximation, saving U and J on the particles.

NOTE: This method accumulates the calculation on the properties U and J of every particle without previously emptying those properties.