MFC
Exascale flow solver
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m_reactive_burn.fpp.f90
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2!>
3!! @file
4!! @brief Contains module m_reactive_burn
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231
232! GPU parallel region (scalar reductions, maxval/minval)
233# 23 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
234
235! GPU parallel loop over threads (most common GPU macro)
236# 43 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
237
238! Required closing for GPU_PARALLEL_LOOP
239# 55 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
240
241! Mark routine for device compilation
242# 112 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
243
244! Declare device-resident data
245# 130 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
246
247! Inner loop within a GPU parallel region
248# 145 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
249
250! Scoped GPU data region
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252
253! Host code with device pointers (for MPI with GPU buffers)
254# 193 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
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256! Allocate device memory (unscoped)
257# 207 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
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259! Free device memory
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262! Atomic operation on device
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264
265! End atomic capture block
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267
268! Copy data between host and device
269# 254 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
270
271! Synchronization barrier
272# 266 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
273
274! Import GPU library module (openacc or omp_lib)
275# 275 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
276
277! Emit code only for AMD compiler
278# 282 "/home/runner/work/MFC/MFC/src/common/include/parallel_macros.fpp"
279
280! Emit code for non-Cray compilers
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282
283! Emit code only for Cray compiler
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286! Emit code for non-NVIDIA compilers
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295
296! Caution: This macro requires the use of a binding script to set CUDA_VISIBLE_DEVICES, such that we have one GPU device per MPI
297! rank. That's because for both cudaMemAdvise (preferred location) and cudaMemPrefetchAsync we use location = device_id = 0. For an
298! example see misc/nvidia_uvm/bind.sh.
299# 57 "/home/runner/work/MFC/MFC/src/common/include/macros.fpp"
300
301! Allocate and create GPU device memory
302# 77 "/home/runner/work/MFC/MFC/src/common/include/macros.fpp"
303
304! Free GPU device memory and deallocate
305# 85 "/home/runner/work/MFC/MFC/src/common/include/macros.fpp"
306
307! Cray-specific GPU pointer setup for vector fields
308# 109 "/home/runner/work/MFC/MFC/src/common/include/macros.fpp"
309
310! Cray-specific GPU pointer setup for scalar fields
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312
313! Cray-specific GPU pointer setup for acoustic source spatials
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320# 6 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp" 2
321# 1 "/home/runner/work/MFC/MFC/src/common/include/case.fpp" 1
322! This file exists so that Fypp can be run without generating case.fpp files for
323! each target. This is useful when generating documentation, for example. This
324! should also let MFC be built with CMake directly, without invoking mfc.sh.
325
326! For pre-process.
327# 8 "/home/runner/work/MFC/MFC/src/common/include/case.fpp"
328
329! For moving immersed boundaries in simulation
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331# 7 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp" 2
332
333!> @brief Condensed-phase reactive burn: a pressure-driven programmed-burn source that converts a "reactant" fluid into a "product"
334!! fluid on the multi-fluid model (num_fluids=2, chemistry='F'). The two fluids share the same stiffened-gas EOS (gamma, pi_inf) and
335!! differ only in their reference energy qv, so the reactant->product conversion releases (qv_reactant - qv_product) per unit mass
336!! through the mixture EOS with no explicit energy source. Because the two fluids are mechanically identical the volume-fraction
337!! swap is exact (the product volume fraction is the reaction progress), making this a reactive-Euler/ZND detonation model expressed
338!! through the diffuse-interface framework. A shock raises the pressure above rburn%pign, the reactant burns, and the energy release
339!! sustains the shock -- a self-propagating condensed-phase detonation.
341
343
344 implicit none
345
346 private; public :: s_compute_reactive_burn
347
348contains
349
350 !> Add the programmed-burn reaction source to the continuity and volume-fraction RHS.
351 !! @param rhs_vf Right-hand-side accumulator (inout)
352 !! @param q_cons_vf Conserved variables (partial densities live here)
353 !! @param q_prim_vf Primitive variables (pressure and volume fractions live here)
354 !! @param bounds Interior cell bounds
355 subroutine s_compute_reactive_burn(rhs_vf, q_cons_vf, q_prim_vf, bounds)
356
357 type(scalar_field), dimension(sys_size), intent(inout) :: rhs_vf
358 type(scalar_field), dimension(sys_size), intent(in) :: q_cons_vf, q_prim_vf
359 type(int_bounds_info), dimension(1:3), intent(in) :: bounds
360 integer :: x, y, z
361 real(wp) :: rho, pres, lambda, rate, mdot, drive, t_r
362
363
364# 38 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
365
366# 38 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
367#if defined(MFC_OpenACC)
368# 38 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
369!$acc parallel loop collapse(3) gang vector default(present) private(rho, pres, lambda, rate, mdot, drive, T_r) copyin(bounds)
370# 38 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
371#elif defined(MFC_OpenMP)
372# 38 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
373
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378# 38 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
379!$omp target teams loop defaultmap(firstprivate:scalar) bind(teams,parallel) collapse(3) defaultmap(tofrom:aggregate) defaultmap(tofrom:allocatable) defaultmap(tofrom:pointer) &
380# 38 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
381!$omp& private(rho, pres, lambda, rate, mdot, drive, T_r) map(to:bounds)
382# 38 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
383#endif
384 do z = bounds(3)%beg, bounds(3)%end
385 do y = bounds(2)%beg, bounds(2)%end
386 do x = bounds(1)%beg, bounds(1)%end
387 ! reactant is fluid 1, product is fluid 2
388 rho = q_cons_vf(eqn_idx%cont%beg)%sf(x, y, z) + q_cons_vf(eqn_idx%cont%beg + 1)%sf(x, y, z)
389 pres = q_prim_vf(eqn_idx%E)%sf(x, y, z)
390 lambda = q_prim_vf(eqn_idx%adv%beg + 1)%sf(x, y, z) ! reaction progress = product volume fraction
391
392 ! pressure-driven programmed burn: fires only behind the shock (p > rburn%pign)
393 drive = (pres - rburn%pign)/rburn%pref
394 if (drive > 0._wp .and. lambda < 1._wp) then
395 rate = rburn%k*(1._wp - lambda)*drive**rburn%n ! dlambda/dt
396
397 ! Optional Arrhenius temperature dependence: rate *= exp(-rburn%ta/T_r), with T_r the
398 ! reactant phasic temperature from the stiffened-gas EOS T = (p + pi_inf)/((Gamma-1) rho cv).
399 ! rburn%ta = 0 (default) leaves the pure pressure-driven rate unchanged.
400 if (rburn%ta > 0._wp) then
401 t_r = (pres + ps_inf(1))/((gs_min(1) - 1._wp)*cvs(1)*q_cons_vf(eqn_idx%cont%beg)%sf(x, y, &
402 & z)/q_prim_vf(eqn_idx%adv%beg)%sf(x, y, z))
403 rate = rate*exp(-rburn%ta/t_r)
404 end if
405
406 mdot = rho*rate ! mass reactant -> product
407
408 ! continuity: reactant loses mass, product gains it
409 rhs_vf(eqn_idx%cont%beg)%sf(x, y, z) = rhs_vf(eqn_idx%cont%beg)%sf(x, y, z) - mdot
410 rhs_vf(eqn_idx%cont%beg + 1)%sf(x, y, z) = rhs_vf(eqn_idx%cont%beg + 1)%sf(x, y, z) + mdot
411
412 ! volume fraction: exact swap (fluids share the EOS), so d(alpha)/dt = +/- rate
413 rhs_vf(eqn_idx%adv%beg)%sf(x, y, z) = rhs_vf(eqn_idx%adv%beg)%sf(x, y, z) - rate
414 rhs_vf(eqn_idx%adv%beg + 1)%sf(x, y, z) = rhs_vf(eqn_idx%adv%beg + 1)%sf(x, y, z) + rate
415 end if
416 end do
417 end do
418 end do
419
420# 74 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
421#if defined(MFC_OpenACC)
422# 74 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
423!$acc end parallel loop
424# 74 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
425#elif defined(MFC_OpenMP)
426# 74 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
427
428# 74 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
429!$omp end target teams loop
430# 74 "/home/runner/work/MFC/MFC/src/simulation/m_reactive_burn.fpp"
431#endif
432
433 end subroutine s_compute_reactive_burn
434
435end module m_reactive_burn
type(scalar_field), dimension(sys_size), intent(inout) q_cons_vf
Global parameters for the computational domain, fluid properties, and simulation algorithm configurat...
real(wp), dimension(:), allocatable ps_inf
real(wp), dimension(:), allocatable cvs
real(wp), dimension(:), allocatable gs_min
Condensed-phase reactive burn: a pressure-driven programmed-burn source that converts a "reactant" fl...
subroutine, public s_compute_reactive_burn(rhs_vf, q_cons_vf, q_prim_vf, bounds)
Add the programmed-burn reaction source to the continuity and volume-fraction RHS.