Numerical Analysis of Coolant Flow and Heat Transfer in ITER Diagnostic First Wall

Khodak, Andrei; Loesser, G. D.; Zhai, Yuhu; Udintsev, V. S.; Klabacha, Jonathan; Wang, W.; Johnson, David A.; Feder, R.

doi:10.13182/fst14-955

Cited by 9 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To include magnetic flux density induction three additional transport equations were added: (1) where:…”

Section: Modification Of the Codementioning

confidence: 99%

“…Poisson equation is added to insure solenoidal nature of magnetic field using additional scalar: (5) This scalar is used to project magnetic field obtained by equation (1) The following wall boundary conditions are imposed:…”

Section: Modification Of the Codementioning

confidence: 99%

“…ANSYS CFX is a general purpose CFD code, allowing solving hydrodynamics and heat transfer problems. It is used at PPPL for thermal analysis of the complex systems involving fluid flow and heat transfer in liquids and solids [1]. The code was adapted for MHD problems using magnetic induction approach.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adaptation of general purpose CFD code for fusion MHD applications

Khodak

2015

2015 IEEE 26th Symposium on Fusion Engineering (SOFE)

View full text Add to dashboard Cite

Analysis of many fusion applications such as liquid metal blankets requires application of Computational Fluid Dynamics (CFD) methods for electrically conductive liquids in the geometrically complex regions and in the presence of a strong magnetic field. Current state of the art general purpose CFD code allows modeling of the flow in complex geometric regions, with simultaneous conjugated heat transfer analysis in liquid and surrounding solid parts. Together with Magneto Hydro Dynamics (MHD) capability general purpose CFD code will be a valuable tool for design and optimization of fusion devices. This presentation describes an introduction of MHD capability into a general purpose CFD code CFX part of the ANSYS Workbench. The code was adapted for MHD problems using magnetic induction approach. CFX allows introduction of user defined variables using transport, or Poisson equations. For MHD adaptation of the code three additional transport equations were introduced for the components of the magnetic field, with additional Poisson equation for electric potential. Lorentz force is included in the momentum transport equation as a source term. Fusion applications usually involve very strong magnetic field with the values of the Hartmann number of up to tens of thousands. In this situation system of MHD equations became very rigid with very large source terms, and very strong gradients of the variables. To increase system robustness, special measures were introduced during iterative convergence process, such as under-relaxation using source coefficient for momentum and magnetic field equations. MHD implementation in general purpose CFD code was tested against benchmarks specifically selected for liquid metal blanket applications. Results of numerical simulations using present implementation closely match analytical solution for the Hartmann number of up to 15000 for two-dimensional laminar flow in the duct of square cross-section, with conducting and non-conducting walls. Results for three dimensional test cases are also included in the presentation.

show abstract

“…To include magnetic flux density induction three additional transport equations were added: (1) where:…”

Section: Modification Of the Codementioning

confidence: 99%

Section: Modification Of the Codementioning

confidence: 99%

See 1 more Smart Citation

Adaptation of general purpose CFD code for fusion MHD applications

Khodak

2015

2015 IEEE 26th Symposium on Fusion Engineering (SOFE)

View full text Add to dashboard Cite

show abstract

“…Details of the analysis are described in a separate paper. [7] The resulting temperature distribution is used as input for any subsequent combined load case structural analysis. The elemental force density of the full PP assembly from MAXWELL transient electromagnetic analysis is mapped onto the Workbench structural model for combined load case analysis.…”

Section: Analysis Protocolmentioning

confidence: 99%

“…[5][6] The thermal loads on DFWs include 350 kW/m 2 surface heating due to plasma radiation and the nuclear heating with a peak of ~8 MW/m 3 on the equatorial DFW and 5 MW/m 3 on the upper DFW during normal D-T plasma operation. [7] The dominant disruption loads are 120~140 kNm radial moment and 80-130 kNm poloidal moment on an individual equatorial and upper DFW respectively. Figure 3 represents the eddy current density and resultant moments on the DFW at worst disruptions.…”

Section: Introductionmentioning

confidence: 99%

Multiphysics Engineering Analysis for ITER Diagnostic First Wall and Shield Module Design*

Zhai¹,

Loesser²,

Smith³

et al. 2015

eee

Self Cite

View full text Add to dashboard Cite

ITER diagnostic first walls (DFWs) and diagnostic shield modules (DSMs) inside the port plugs (PPs) are designed to protect diagnostic instrument and components from a harsh plasma environment and provide structural support while allowing for diagnostic access to the plasma. The design of DFWs and DSMs are driven by 1) plasma radiation and nuclear heating during normal operation 2) electromagnetic loads during plasma events and associate component structural responses. A multi-physics engineering analysis protocol for the design has been established at Princeton Plasma Physics Laboratory and it was used for the design of ITER DFWs and DSMs. The analyses were performed to address challenging design issues based on resultant stresses and deflections of the DFW-DSM-PP assembly for the main load cases. ITER Structural Design Criteria for In-Vessel Components (SDC-IC) required for design by analysis and three major issues driving the mechanical design of ITER DFWs are discussed. The general guidelines for the DSM design have been established as a result of design parametric studies.

show abstract