computational ship hydrodynamics...ship hydrodynamics problems, like slamming and whipping. the code...
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Computational Ship Hydrodynamics
MOERI Propeller
This area of research is coordinated by the ship hydrodynamics group, www.iihr.uiowa.edu/~shiphydro.CFDShip-Iowa is a research code developed under sponsorship of the Office of Naval Research for the past 20 years, with vast capabilities for ship hydrodynamics, enabling some of the most complex and advanced computations possible today.
Athena R/V KCS
ONRtumblehome
DTMB 5415
Fluid-Structure Interaction
MOERI Propeller
22
Associate forcefluid to structure
Associate disp.structure to fluid
Structure analysis
For displacement
Sol
ve fl
ow fie
ldW
ith n
ew g
rid
VBM
(kg×
m)
-2
-1
0
1
SG1
VBM
(kg×
m)
-2
0
2
SG2
Time (s)
VBM
(kg×
m)
8.8 9.0 9.2 9.4 9.6 9.8-2
-1
0
1
2
ExperimentRigid modelOne-wayTwo-waySG3
t/T
Fx
0.0 0.2 0.4 0.6 0.8 1.01.60
1.65
1.70
1.75
1.80
1.85
1.90Non-deformationSmall DeformationLarge DeformationLarge Deformation in Boundary Layer
The Fluid-Structure Interaction capabilities in CFDShip-Iowa were added under a grant from the Office of Naval Research for use in ship hydrodynamics problems, like slamming and whipping. The code has recently been applied to wind turbine flows, under a grant from NCCS for supercomputer usage.
NREL Phase VI wind turbine
S175 container ship
Two-Phase Flow Modeling and Experimentation
The research in multiphase flow is focused in study of bubbly flows in the presence of a free surface. To measure gas volume fraction, bubble velocity and bubble size distribution we develop optical phase detection probes made of sapphire fibers, with capability to measure in full-scale environments. We are also interested in numerical modeling of bubble entrainment, transport and dissolution. The research in two-phase flow is supported by the Office of Naval Research and the National Science Foundation.
IIHR 50 micron sapphire probe, 15 micron tip
170 micron radius bubble
Bubbly surface jets
Phase-detection probes
Bubbly flow in ships