1 / 18

Overview of Edge Modeling Efforts at ASIPP

Overview of Edge Modeling Efforts at ASIPP. 朱思铮 中国科学院等离子体物理所 2011.11.26. ASIPP 边界等离子体模拟课题研究内容. 模拟与实验 分析解释实验，并由实验结果检验改进程序（ Validation ） --〉 提高预测能力，为实验提供理论支持。 模拟与工程 对 EAST 偏滤器进行优化，进一步改善偏滤器性能 --〉 保障下一步更高功率、更大热负荷条件下的长脉冲 运行。 主要模拟程序 SOLPS. Various SOLPS Versions.

cynthia-mcmahon
Télécharger la présentation

Overview of Edge Modeling Efforts at ASIPP

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Overview of Edge Modeling Efforts at ASIPP 朱思铮 中国科学院等离子体物理所 2011.11.26

  2. ASIPP边界等离子体模拟课题研究内容 • 模拟与实验 • 分析解释实验，并由实验结果检验改进程序（Validation） • --〉提高预测能力，为实验提供理论支持。 • 模拟与工程 • 对EAST偏滤器进行优化，进一步改善偏滤器性能 • --〉保障下一步更高功率、更大热负荷条件下的长脉冲 • 运行。 • 主要模拟程序 • SOLPS

  3. Various SOLPS Versions - SOLPS4: grid to the wall, comprehensive neutral model, parallelization - SOLPS5: drifts, currents, high-Z impurity transport

  4. Urgent SOLPS upgrade needs for ITER Plasma interaction with first wall  Grid to the wall, radial transport, wall model W divertor  W erosion and transport, impurity seeding (particle balance for high-Z impurities – not solved yet!) The best available models for plasma and neutrals together  MergingSOLPS4 and SOLPS5 Performance improvementin parallel processing environment - CPU development: massive parallel computations - Parallelisation of the B2/B2.5  Improvement is needed to fit modern computers

  5. Whether or not ITER design activity should be upgraded from SOLPS4 to SOLPS5 1) Coupling of SOLPS5.2 with EIRENE-PARALLEL (2009) to form SOLPS5.3. 2) Extend the existing SOLPS4/5 benchmarking exercise: SOLPS4.3 versus SOLPS5.3. 3) Consult with the SOLPS community and produce a report detailing the advantages and disadvantages of moving the ITER design modelling effort from SOLPS 4 to 5.

  6. 一. 模拟与实验 • EAST实验已经取得了2秒H-mode、100秒长脉冲和1MA等离子体电流的好结果，其中lithium的应用起了很大作用。 • 理论模拟将加强与实验的结合： • 在对实验的模拟和解释中，加入漂移和电流的影响。 • 进行H-mode条件下的偏滤器物理模拟。 • 模拟Li对PFC上再循环和对边界等离子体输运的影响。

  7. 1. H-mode边界等离子体模拟 1.1 Problems in SOLPS5.0 with drifts - Small time step is required for L-mode - Absence of convergence for H-mode SOLPS modelling of AUG H-mode plasma A.V. Chankin et al, 2006 Most of the cases were run without drifts since their inclusion introduced severe numerical problems, leading to a dramatic reduction in the required time step. Code development for ITER edge modelling – SOLPS5.1 X. Bonnin et al, 2009 However, the numerics of the drifts in SOLPS5.x are not yet entirely satisfactory, therefore some effort is invested into improving the code stability and increasing the domain of convergence. SOLPS5 modlling of the type III ELMing H-mode on TCV B. Gulejova et al, 2007 no drifts have been included at this stage Time-dependent modelling of ELMing H-mode at TCV with SOLPS5 B. Gulejova et al, 2007 no drift terms are activated SOLPS5 simulations of Type I ELMing H-mode at JET B. Gulejova et al, 2009 The highest level of complexity (namely the inclusion of drifts) is not attempted here since they were not included in the original EDGE2D-NIMBUS simulations.

  8. 1.2 SOLPS5.2 • Developed for the simulation of H-mode shots. • Convergence was demonstrated for an ASDEX Upgrade, H-mode, inter-ELM simulation with the full drift model included [Rozhansky 2009] (fluid neutral particle model).

  9. 1.3 Kinetic module • for parallel plasma transport in the SOL and divertor • SOL energy transport during transient • Type I ELM phases of the H-mode discharges needs a true kinetic simulation. • Parallel Kinetic module solves along field lines, exchange (particle, heat) between flux surfaces. • Kinetic module + SOLPS: realisticχ||, thermoforce coeff., target heat γ, • ionization/excitation coeff.

  10. 2. 模拟Li对边界等离子体输运的影响 Lithium --〉High D pumping • SOLPS - Vary the recycling coefficient R of deuterium ions and neutrals pumped by lithium coated surface. • SOLPS/(ERO,EDDY?) • Plasma edge/SOL code • + sputtering, erosion/redeposition code • -〉calculate full SOL lithium profile. • EMC3-Eirene (东华大学合作）

  11. 3. 边界等离子体中的径向输运模拟 • 3.1 Convective cross field transport： • Blobs – transport via coherent structures • SOLPS • Diffusion-convective model – the outward radial convective velocity Vc(r) is strongly inhomogeneous in the poloidal direction in agreement with blobby plasma transport. • BOUT (Edge turbulence, ELM, Blob)

  12. 3.2 SOLPS modelling including the main chamber wall

  13. 二. 模拟和工程 • 1. EAST内部结构改造： • 模拟第一壁材料改变后，杂质输运和辐射变化对靶板热负荷的影响。 • 模拟（提议中？）dome位置的改变，对杂质屏蔽和抽气效率的影响，优化偏滤器位形。

  14. 2. W divertor 2.1 “bundled charge states” model Different W bundles used Profiles of Zeff with and w/o bundling of Ar states and CX processes

  15. 2.2 SOLPS/DIVIMP - tungsten erosion and deposition 利用杂质输运程序DIVIMP和SOLPS产生的背景等离子体，详细模拟研究W的溅射和再沉积，以及在边界等离子体中的输运过程等。 2.3 EMC3-Eirene (东华大学合作）

  16. 三. 集成模拟 ONETWO-SOLPS 初步开展SOLPS边界模拟与芯部输运程序ONETWO相耦合的工作，从总体上研究边界等离子体和芯部等离子体的行为及其相互影响。 国外Core-Edge集成模拟 FACETS ASTRA-SOLPS JINTRAC – Jet INtegrated TRAnsport Code

  17. SOLPS integrated with ASTRA (core)

  18. Some topics related to SOL • Absorption of LHW in the SOL • Scattering of RFW by blob-filaments • Interaction of SOL with MHD instabilities • (tearing mode, RWM)

More Related