Abstract Details
Abstracts
Author: Benjamin T Taczak
Requested Type: Poster
Submitted: 2026-03-20 17:13:02
Co-authors: L. Casali, A. Irvin, N. Li, V. Quadri, and X.Q. Xu
Contact Info:
University Of Tennessee - Knoxville
863 Neyland Drive
Knoxville, Tennessee 37916
United States
Abstract Text:
A novel method of coupling SOLPS-ITER to a six-field two-fluid model using BOUT++ is reported in this work. Correct predictions of divertor particle and heat flux are reliant on turbulence-informed simulations of transport in edge plasmas. This coupling bridges the multi-spatiotemporal, multi-physics challenge in plasma edge simulations. The BOUT++ model includes peeling-ballooning physics to simulate the effects of ELMy H-mode plasmas [1]. This 3D BOUT++ simulation was coupled to the fluid plasma and Monte-Carlo neutral 2D transport code SOLPS-ITER for H-mode transport at the plasma edge. Radial fluxes in BOUT++ have been successfully used to inform poloidally and radially varying anomalous diffusion coefficients in SOLPS-ITER. A converged H-mode SOLPS-ITER simulation is used as an initial state with the same physical space simulated in both SOLPS-ITER and BOUT++ simulations. The BOUT++ grid has significantly higher radial resolution to account for increased fidelity of edge turbulence modelling, and the SOLPS-ITER grid has significantly higher resolution in the divertor. The plasma state is simulated in BOUT++ such that the particle and energy fluxes are extracted to inform the anomalous diffusion coefficients in SOLPS-ITER. The plasma state is then iteratively passed between the codes until SOLPS-ITER solution is invariant between coupling iterations. This new capability enables turbulence-informed transport at the plasma edge, thereby eliminating the diffusion coefficient profile as a user-defined input to match experimental results. Additionally, this coupling enables the inclusion of effects arising from transients and the interplay between the pedestal structure, edge turbulence and divertor-plasma solutions.
Work supported by the U.S. Department of Energy, under Award(s) R011382908 (DOE - SCIDAC), NRC 31310022M0014.
Characterization: 1.0
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