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Addition of complete electromagnetic momentum fluxes #474

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Addition of complete electromagnetic momentum fluxes #474

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4270719
allow for mixed-parity initial conditions in h for testing
physycola Aug 6, 2025
eb589ca
Modified momentum flux diagnostics to include the Maxwell stress, and…
physycola Aug 29, 2025
cd72f13
Merge branch 'master' into momentum_flux
physycola Nov 12, 2025
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14 changes: 11 additions & 3 deletions cgyro/src/cgyro_init_arrays.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ subroutine cgyro_init_arrays
!-------------------------------------------------------------------------
! Distributed Bessel-function Gyroaverages

allocate(jloc_c(2,nc,nt1:nt2))
allocate(jloc_c(3,nc,nt1:nt2))

do itor=nt1,nt2
iv_loc = 0
Expand All @@ -63,6 +63,14 @@ subroutine cgyro_init_arrays
! Needed for B_parallel in GK and field equations

jloc_c(2,ic,itor) = 0.5*(jloc_c(1,ic,itor) + bessel_jn(2,arg))/bmag(it)

! Needed for Maxwell stress (A_parallel) term in momentum flux

if(itor == 0) then
jloc_c(3,ic,itor) = 0.0
else
jloc_c(3,ic,itor) = bessel_j0(arg)/(arg**2)
endif

enddo

Expand Down Expand Up @@ -95,15 +103,15 @@ subroutine cgyro_init_arrays

if (n_field > 1) then
efac = -xi(ix)*vel2(ie)*vth(is)
jxvec_c(2,ic,iv_loc,itor) = efac * fac * (bmag(it) * jloc_c(2,ic,itor))
jxvec_c(2,ic,iv_loc,itor) = efac * fac * (bmag(it) * jloc_c(2,ic,itor) + jloc_c(3,ic,itor))

if (n_field > 2) then
if(itor == 0) then
jxvec_c(3,ic,iv_loc,itor) = 0.0
else
jxvec_c(3,ic,iv_loc,itor) = fac * z(is)*bmag(it)/mass(is) &
/(k_perp(ic,itor)*rho)**2 &
* (bmag(it) * jloc_c(2,ic,itor) - jloc_c(1,ic,itor))
* (2 * bmag(it) * jloc_c(2,ic,itor) - jloc_c(1,ic,itor))
endif
endif

Expand Down
2 changes: 1 addition & 1 deletion cgyro/src/cgyro_init_h.f90
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Expand Up @@ -134,7 +134,7 @@ subroutine cgyro_init_h
h_x(ic,iv_loc,nt1) = rho/(1.0+ang**4)
else
! anti-symmetric
h_x(ic,iv_loc,nt1) = rho*ang/(1.0+ang**4)
h_x(ic,iv_loc,nt1) = 0.5*rho*(1+ang)/(1.0+ang**4)
endif
enddo
endif
Expand Down
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