Numerical modelling for divertor design of the WEST device with a focus on plasma–wall interactions

2015 ◽  
Vol 55 (5) ◽  
pp. 053025 ◽  
Author(s):  
H. Bufferand ◽  
G. Ciraolo ◽  
Y. Marandet ◽  
J. Bucalossi ◽  
Ph. Ghendrih ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
The West ◽  
Wall Interactions

scholarly journals Tributaries to West Antarctic ice streams: characteristics deduced from numerical modelling of ice flow

2000 ◽  
Vol 31 ◽  
pp. 184-190 ◽  
Author(s):  
Christina L. Hulbe ◽  
Ian R. Joughin ◽  
David L. Morse ◽  
Robert A. Bindschadler
Keyword(s):  
Numerical Modelling ◽  
Stream Flow ◽  
Water Storage ◽  
Consistent Pattern ◽  
Ice Thickness ◽  
Ice Streams ◽  
The West ◽  
Ice Flow ◽  
West Antarctic ◽  
Ice Stream

AbstractA network of relatively fast-flowing tributaries in the catchment basins of the West Antarctic ice streams transport ice from the inland reservoir to the heads of the ice streams. Branches of the network follow valleys in basal topography but not all valleys contain tributaries. We investigate the circumstances favoring tributary flow upstream of Ice Streams D and E, using a combination of observation and numerical modelling. No consistent pattern emerges. The transition from tributary to ice-stream flow occurs smoothly along the main tributary feeding into the onset of Ice Stream D, with ice thickness being relatively more important upstream, and sliding being relatively more important downstream. Elsewhere, the downstream pattern of flow is more complicated, with local increases and decreases in the contribution of sliding to ice speed. Those changes may be due to variations in basal water storage, subglacial geologic properties or a combination of the two.

scholarly journals Numerical Modelling of Ballast Water Dispersion in Different Bioregions along the Coast of India

2018 ◽  
Vol 35 (1-2) ◽  
pp. 31-36
Author(s):  
M.T. Babu ◽  
K Sudheesh ◽  
P Vethamony ◽  
S Anuvindha
Keyword(s):  
Numerical Modelling ◽  
West Coast ◽  
Ballast Water ◽  
East Coast ◽  
Marine Organisms ◽  
Coastal Currents ◽  
The West ◽  
Water Dispersion ◽  
Study Results ◽  
Modelling Studies

Aquatic organisms and pathogens may become major threats to the coastal and marine environment when introduced into a region beyond their natural distributions through ballast water (BW). Coastal currents induced by tides and winds, especially ebb currents, may facilitate the spread of these marine organisms along nearshore and inshore areas. Numerical modelling of hydrodynamics is an effective tool to track the dispersion of these organisms in the receiving water body through BW release. Particle transport models can be used to track the advection and dispersion of these organisms. Alternatively, the difference in salinity of the BW and coastal waters can be used as a tracer to estimate the dispersion pattern. Tides and winds present in the region at the time of BW release are responsible for the dispersal of the particles present in BW discharge. Based on advection and dispersion processes, the transport of the marine organisms present in the BW can be studied using numerical models. Numerical modelling studies were carried out using the 2-D hydrodynamic model MIKE21 HD, to understand the pattern of BW dispersion at select bioregions along the east and west coasts of India. Mangalore Port located along the west coast in Bioregion-I (CIO-I) and Chennai Port on the east coast in Bioregion-II (CIO-II) were selected for the modelling study. Results obtained from ballast water dispersion modelling studies will be useful for developing and assisting port-based ballast water management programmes for CIO-I and CIO-II regions. The currents are predominantly tide driven near the ports situated along the west coast and the circulation exhibited reversals associated with the tidal currents. However, along the east coast of India, the particles largely followed coastal currents - advected either southward or northward under the influence of prevailing coastal currents in the offshore region and tidal reversals showed had less impact. This information proved useful for determining suitable locations for BW discharge and monitoring points for field sampling in connection with BW release.

Investigation of plasma wall interactions between tungsten plasma facing components and helium plasmas in the WEST tokamak

2021 ◽  
Author(s):  
Emmanuelle Tsitrone ◽  
Bernard Pegourie ◽  
James Paul Gunn ◽  
Elodie Bernard ◽  
Vincent Bruno ◽  
...  
Keyword(s):  
The West ◽  
Plasma Facing Components ◽  
Wall Interactions

The continuing inflation of Montserrat – and the end of the intrusion

2020 ◽  
Author(s):  
Jurgen Neuberg ◽  
Karen Pascal
Keyword(s):  
Numerical Modelling ◽  
Gas Phase ◽  
West Indies ◽  
Extreme Case ◽  
Deformation Pattern ◽  
Magma Intrusion ◽  
The West ◽  
Magma Body ◽  
Alternative Routes ◽  
Eruptive Behaviour

<p>Soufrière Hills volcano on Montserrat in the West Indies showed five episodes of magma extrusion and as many pauses in its 25years of volcanic activity. This eruptive behaviour exhibited cyclic deformation pattern where extrusive “phases” showed island-wide deflation and all “pauses” have been linked to inflation, the last of which remains ongoing. Several models have been developed over the years; all based on magma intrusion and extrusion, into, or from one or several reservoirs, respectively. Using the entire eruptive history, we demonstrate that both, pauses and phases can be linked to a single magma body. Through extensive numerical modelling, we explore in this presentation some alternative routes to magma intrusion, considering several magmatic processes. These range from crystallisation of magma (second boiling) to pressurisation through a free gas phase, to the extreme case where intrusion of fresh magma has ceased years ago, while the inflation is continuing. </p>

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