Simulation of neutral gas flow in a tokamak divertor using the Direct Simulation Monte Carlo method

Gleason-Gonzalez, C.; Varoutis, S.; Hauer, V.; Day, Christian

doi:10.1016/j.fusengdes.2014.02.005

Cited by 20 publications

(16 citation statements)

References 7 publications

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“…It has to be noted that this strong recycle pattern has not been found in the calculations with the previous divertor design for which the pumped flow and the backflow was of similar magnitude [4]. In 2D DSMC calculations on the intra cassette flow pattern [5,6], a reversed behaviour was found, indicating a much stronger flow towards the pumps than towards the plasma. This seems to indicate that the ITERVAC results discussed above are mainly due to the flows in the gaps in between the cassettes.…”

Section: Simulation Results For the Burn Phasementioning

confidence: 77%

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ITER divertor gas flow modelling

Hauer

Day

2015

Fusion Engineering and Design

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Section: Simulation Results For the Burn Phasementioning

confidence: 77%

“…The power crossing the magnetic separatrix and entering the scrape-off layer was 100 MW. The input parameters for these simulations were also used for DSMC simulations and the comparison with ITERVAC, described in [5].…”

Section: Simulation Results For the Burn Phasementioning

confidence: 99%

ITER divertor gas flow modelling

Hauer

Day

2015

Fusion Engineering and Design

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“…For lower density cases the same/similar dependence was obtained with the DIVGAS code utilising Direct Simulation Monte Carlo (DSMC, [33]), and both DIVGAS and EIRENE were positively benchmarked against each other [34]. For higher densities and detached JET-ILW divertors the DSMC model conjectures a significant effect of the neutral viscosity at Knudsen numbers Kn < 1.…”

Section: Particle and Power Exhaustmentioning

confidence: 63%

Modelling of plasma-edge and plasma–wall interaction physics at JET with the metallic first-wall

et al. 2016

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An overview is given on the recent progress on edge modelling activities for the JET ITERlike wall using the computational tools like the SOLPS or EDGE2D-EIRENE code. The validation process of these codes on JET with its metallic plasma-facing components is an important step towards predictive studies for ITER and DEMO in relevant divertor operational conditions, i.e., for detached, radiating divertors. With increased quantitative credibility in such codes more reliable input to plasma-wall and plasma-material codes can be warranted, which in turn results in more realistic and physically sound estimates of the lifetime expectations and performance of a Be first-wall and a W-divertor, the same materials configuration foreseen for ITER. A brief review is given on the recent achievements in the plasma-wall interaction and material migration studies. Finally, a short summary is given on the availability and development of integrated codes to assess the performance of an JET-ILW baseline scenario also in view of the preparation for a JET DT-campaign.

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“…Plasma plumes exist widely in aerospace propulsion [1], industrial coating [2,3] and nuclear reactors [4,5] such as plasma thrusters in the aerospace propulsion system [6] and micro-cathode vacuum arc thrusters for microsatellites [7]. In the thruster devices described above, plasma is injected to the environmental medium at an extremely high speed, and a feather-like jet flow called a plume is diffused into the surrounding environment rapidly.…”

Section: Introductionmentioning

confidence: 99%

Study on Chemical Reactions of Ions and Neutral Particles on the Wall with DSMC Method

Su¹,

Li²,

Fan³

2018

Proceedings of the 2018 3rd International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE 201

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Abstract. Plasma plumes exist widely in the electric propulsion systems. Neutral particles, ions, and metal particles are included in the flow field. Complex collisions occur between the particles. Particles will collide with the wall surface when they move towards the wall, then some particles will reflect back, the others will react on the wall with a certain probability. Chemical reactions on the wall have a significant effect on the distribution of the particles and lead to the change of density in the flow field. The chemical reaction models on the wall are studied based on the direct simulation of Monte Carlo method (DSMC). Five types of particles including molecular hydrogen H 2 , atomic hydrogen H, atomic Titanium Ti, ion H 2 + , and ion H + are studied in the flow field, there are chemical reactions for these particles with a certain probability on the wall. The numerical simulation results show that the number density of molecular hydrogen H 2 increases obviously, the number density of atomic hydrogen H increases slightly, and the number density of ion H + decreases significantly after adding the chemical reaction models on the wall, indicating that the chemical reactions on the wall have a significant influence on the distribution of the particles in the flow field. The study in this paper provides basic data for further research on plasma plumes by the numerical simulation.

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Simulation of neutral gas flow in a tokamak divertor using the Direct Simulation Monte Carlo method

Cited by 20 publications

References 7 publications

ITER divertor gas flow modelling

ITER divertor gas flow modelling

Modelling of plasma-edge and plasma–wall interaction physics at JET with the metallic first-wall

Study on Chemical Reactions of Ions and Neutral Particles on the Wall with DSMC Method

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