An efficient modeling of fine air-gaps in tokamak in-vessel components for electromagnetic analyses

Oh, Dong Keun; Pak, S.; Jhang, Hogun

doi:10.1016/j.fusengdes.2011.08.010

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…This requires considerable effort in modeling complex mechanical structures. A modeling method without using air elements has been described in [10]. However, this is limited to narrow gaps between conductive parts.…”

Section: A Problem Descriptionmentioning

confidence: 99%

Strategies of Numerical Modeling in Component Development for Fusion Devices

Neubauer

Panin

Czymek

et al. 2014

IEEE Trans. Plasma Sci.

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The development of components for fusion devices includes numerous simulations to validate their design compatibility with specified loads according to applicable codes and standards. The strategy of multifield finite element analyses is determined by the iterative nature of the design process. The level of structural complexity dictates the analytical approaches and modeling techniques. Even though nowadays powerful software exploiting the performance of modern computers allows structures to be simulated in a very detailed way, direct meshing of CAD models with all their complexity is often not beneficial for nonlinear and multifield analyses. Reasonable modeling simplifications, submodeling, and integration with analytical modeling and testing can optimize the analysis process. This paper gives examples of simplified modeling for engineering purposes with a clear understanding of the analysis goal and the role of simulations in the design process, such as for the W7-X stellarator busbar system. Engineering methods to perform multifield analyses including electromagnetic transients for ITER diagnostic port plug components are also presented. An engineering material model is discussed for calculating the superconducting coil steel structures operating in the inelastic range.

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Section: A Problem Descriptionmentioning

confidence: 99%

Strategies of Numerical Modeling in Component Development for Fusion Devices

Neubauer

Panin

Czymek

et al. 2014

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

show abstract

Electromagnetic load calculation of the ITER machine using a single finite element model including narrow slits of the in-vessel components

Pak

Jhang

et al. 2013

Fusion Engineering and Design

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Approaches to numerical modeling in development process of complex structures for fusion devices

Neubauer

Panin

Czymek

et al. 2013

2013 IEEE 25th Symposium on Fusion Engineering (SOFE)

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Development of components for fusion device normally comprises numerous simulations to validate their design compatibility with the specified loads according to applicable codes and standards. A strategy of multifield finite element analyses is determined by an iterative nature of design process, and a level of a structure complexity dictates analysis approaches and modeling technique. Nowadays powerful software exploiting the strength of modern computers allows simulating structures in a very detailed way, even for some types of coupled field analyses. As some drawback of this tendency, many efficient numerical tools, used in the past, are not frequently engaged. Sometimes huge numerical resources are spent to solve trivial problems. Direct CAD-analysis meshing of structures in all their complexity may mix effects of different importance and may lead to overlooking some key structure features. Computational problems with convergence in nonlinear analyses often make modeling less flexible to design changes. This paper gives examples of engineering simplified modeling made with clear understanding of an analysis goal and a role of simulations in design process, like for the W7-X stellarator busbar system. Engineering methods to perform multifield analysis including electromagnetic transients for some ITER diagnostics are also presented. An engineering material model to calculate steel superconducting structures working in inelastic range is discussed.

show abstract

An efficient modeling of fine air-gaps in tokamak in-vessel components for electromagnetic analyses

Cited by 4 publications

References 14 publications

Strategies of Numerical Modeling in Component Development for Fusion Devices

Strategies of Numerical Modeling in Component Development for Fusion Devices

Electromagnetic load calculation of the ITER machine using a single finite element model including narrow slits of the in-vessel components

Approaches to numerical modeling in development process of complex structures for fusion devices

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