TY - CHAP
T1 - The integration of thermal-hydraulics (CFD) and structural analysis (FEM) computer codes in liquid and solid mechanics (MULTIPHYSICS)
AU - Lestinen, Ville
AU - Timperi, Antti
AU - Pättikangas, Timo
PY - 2004
Y1 - 2004
N2 - The main objective of the project is to improve modeling
capabilities in fluid-structure-interaction (FSI)
systems. Because FSI -problems are very common in
industry, there is a need to develop simulation tools for
these problems. An important application in nuclear
industry is the structural integrity of nuclear reactor
core internals in Design Basis Accident (DBA). The
specific case studied in the project is Large Break Loss
of Coolant Accident (LBLOCA) and especially the pressure
transient, which is caused by the guillotine pipe break
in LBLOCA. Tools planned to be used for the analysis are
computational fluid dynamics (CFD) and finite element
stress and strain analysis (FEA) codes. An original aim
of the project was to study the possibility to develop a
common numerical model for system geometry with suitable
meshing for all physical analysis disciplines, including
both CFD and FEA modeling. However, quite soon the target
proved to be unrealistic. The common meshing would
decrease the quality of both analyses too much. In the
next phase the target was set on separate calculation of
the pressure transient with CFD and FEA codes and also on
development of the method, which could link CFD and FEA
calculation results through interpolation. Firstly, one
way coupling between CFD and FEA has been tested, but the
final goal is to use a two way link. The codes used in
this work are NASTRAN and ABAQUS on the FEA side and
STAR-CD in the CFD side. In this paper separate pressure
transient calculations using CFD and FEA codes in LBLOCA
case are presented. The case has been calculated
separately with NASTRAN and STAR-CD. Also one way link
between STAR-CD and ABAQUS is tested.
AB - The main objective of the project is to improve modeling
capabilities in fluid-structure-interaction (FSI)
systems. Because FSI -problems are very common in
industry, there is a need to develop simulation tools for
these problems. An important application in nuclear
industry is the structural integrity of nuclear reactor
core internals in Design Basis Accident (DBA). The
specific case studied in the project is Large Break Loss
of Coolant Accident (LBLOCA) and especially the pressure
transient, which is caused by the guillotine pipe break
in LBLOCA. Tools planned to be used for the analysis are
computational fluid dynamics (CFD) and finite element
stress and strain analysis (FEA) codes. An original aim
of the project was to study the possibility to develop a
common numerical model for system geometry with suitable
meshing for all physical analysis disciplines, including
both CFD and FEA modeling. However, quite soon the target
proved to be unrealistic. The common meshing would
decrease the quality of both analyses too much. In the
next phase the target was set on separate calculation of
the pressure transient with CFD and FEA codes and also on
development of the method, which could link CFD and FEA
calculation results through interpolation. Firstly, one
way coupling between CFD and FEA has been tested, but the
final goal is to use a two way link. The codes used in
this work are NASTRAN and ABAQUS on the FEA side and
STAR-CD in the CFD side. In this paper separate pressure
transient calculations using CFD and FEA codes in LBLOCA
case are presented. The case has been calculated
separately with NASTRAN and STAR-CD. Also one way link
between STAR-CD and ABAQUS is tested.
M3 - Chapter or book article
SN - 951-38-6515-0
T3 - VTT Tiedotteita - Research Notes
SP - 124
EP - 131
BT - SAFIR, The Finnish Research Programme on Nuclear Power Plant Safety 2003 - 2006
PB - VTT Technical Research Centre of Finland
CY - Espoo
ER -