[u, v, w, y]

c = 1.0 - y
wrate = rxn_rate(c)

mask1 = $threshold_min_max(c, 0.05, 0.15)
mask2 = $threshold_min_max(c, 0.15, 0.25)
mask3 = $threshold_min_max(c, 0.25, 0.35)
mask4 = $threshold_min_max(c, 0.35, 0.45)
mask5 = $threshold_min_max(c, 0.45, 0.55)
mask6 = $threshold_min_max(c, 0.55, 0.65)
mask7 = $threshold_min_max(c, 0.65, 0.75)
mask8 = $threshold_min_max(c, 0.75, 0.85)
mask9 = $threshold_min_max(c, 0.85, 0.95)

fsd_orig = sqrt (sqr(ddx(c)) + sqr(ddy(c)) + sqr(ddz(c)))

fsd = fsd_orig * mask

fsd1 = fsd_orig * mask1
fsd2 = fsd_orig * mask2
fsd3 = fsd_orig * mask3
fsd4 = fsd_orig * mask4
fsd5 = fsd_orig * mask5
fsd6 = fsd_orig * mask6
fsd7 = fsd_orig * mask7
fsd8 = fsd_orig * mask8
fsd9 = fsd_orig * mask9

sd = ((d2dx(c) + d2dy(c) + d2dz(c)) * $rod + wrate) / fsd_orig

nx = - ddx(c) / fsd_orig
ny = - ddy(c) / fsd_orig
nz = - ddz(c) / fsd_orig

vn = u * nx + v * ny + w * nz

divn = ddx(nx) + ddy(ny) + ddz(nz)

absk = abs(divn)

lapc = d2dx(c) + d2dy(c) + d2dz(c)

t1 = (vn + sd) * nx

t2 = t1' * nx'

t3 = t1' * divn'

t4 = t1' * absk'

t5 = sqr(t1')

t6 = sqr(nx')

t7 = sqr(divn')

t8 = sqr(absk')

avg { c, u, v, w, fsd1, fsd2, fsd3, fsd4, fsd5, fsd6, fsd7, fsd8, fsd9, lapc, ddx_c, ddy_c, ddz_c, d2dx_c, d2dy_c, d2dz_c }

avg fsd1 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }
avg fsd2 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }
avg fsd3 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }
avg fsd4 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }
avg fsd5 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }
avg fsd6 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }
avg fsd7 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }
avg fsd8 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }
avg fsd9 { nx, ny, nz, t1, t2, t3, t4, t5, t6, t7, t8, absk, divn, sd }