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Numerical Analysis of underwater body
in Super-cavitating Flow
NUMAP-FOAM 2010 Summer School
Seoul National University, Korea
Sunho Park
Goal of Summer School
ØTo better understand NUMAP-FOAMØTo make solver including cavitation and GGIØTo make solver including cavitation, GGI and six
DOF
2
Strategy
ØMake new Foam in Summer School– Run simplified tutorial
ØValidation and application is later
ØFoam
3
ØFoam
– Cavitation + SRF
– Cavitation + Moving Mesh
– Cavitation + Moving Mesh + 6 DOF
Single Reference Fame
ØCavSRFFoam (Cavitation + Single Reference Frame)
– Consider rotational force in source term
4
Moving Mesh
ØCavDyMFoam (Cavitation + Moving Mesh)– Considering mesh motion before U equation
5
Cp on Hemisphere body
Moving Mesh and 6 DOF
ØCavDyM6DOFFoam (Cavitation + Moving Mesh + 6 DOF)– Considering 6 DOF before mesh motion – 6 DOF
8
– 6 DOF• Calculate force and moment on body → calculate displacement and rotation angle of each cell on body → patch on point and cell displacement files
rasInterDyMFoam
ØrasInterDyMFoam (received from Henrik)– Free surface–Wave generation– Beach boundary
11
– Beach boundary–Moving mesh (GGI)– 6 DOF Motion
Wave tank
ØrasInterDyMFoam–Wave generation and beach boundary work well–Not smooth interface → need high
12
–Not smooth interface → need high resolution interface capturing scheme ?
Concluding remark
ØI make my own Foams– cavSRFFoam– cavDyMFoam– CavDyM6DOFFoam
15
– CavDyM6DOFFoam
ØAnd get useful Foam– rasInterDyMFoam