ComFlo/ComFLOW home page
ComFlo is a simulation method for free-surface flow in terrestrial
and micro-gravity environments. It models viscous incompressible flow
in and around arbitrary geometries. At the free surface continuity
of stresses is imposed; effects of capillarity are included.
Also liquid-solid body interaction is included in (some versions of) ComFlo.
A major application area (in cooperation with MARIN) concerns
the prediction of hydrodynamic wave loading on ships and offshore platforms.
This extension of the ComFlo code is called ComFLOW.
For validation purposes, at MARIN a series of experiments is carried out.
Details about the dambreak experiments can be found
here.
Another application area (in cooperation with NLR) concerns spacecraft
dynamics as influenced by onboard liquids. Validation experiments have been
carried out in February 2005 with the Sloshsat FLEVO satellite.
Finally, a ComFlo version has been developed to model hemodynamics in
elastic arteries.
A detailed description of the mathematical and numerical modelling
inside ComFlo/ComFLOW can be found in the PhD theses of
Jeroen Gerrits (December 2001),
Erwin Loots (May 2003),
Geert Fekken (March 2004),
Theresa Kleefsman (November 2005) and
Rik Wemmenhove (May 2008).
Some ComFlo/ComFLOW animations of free-surface flow can be found at our
CFD gallery.
Literature on ComFlo/ComFLOW and its applications
2009
-
Bogdan Iwanowski, Rune Gladso, Marc Lefranc,
Wave-In-Deck Load on a Jacket Platform, CFD-derived Pressures
and Non-Linear Structural Response.
In: Proc. 28th Conf. on Ocean, Offshore and Arctic Eng. OMAE2009,
May 31-June 5, 2009, Honolulu, paper OMAE2009-79053.
(pdf)
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Bogdan Iwanowski, Marc Lefranc, Rik Wemmenhove,
Numerical Simulation of Sloshing in a Tank, CFD Calculations against Model
Tests.
In: Proc. 28th Conf. on Ocean, Offshore and Arctic Eng. OMAE2009,
May 31-June 5, 2009, Honolulu, paper OMAE2009-79051.
(pdf)
-
Bogdan Iwanowski, Marc Lefranc, Rik Wemmenhove,
CFD Simulation of Wave Run-up on a Semi-Submersible
and Comparison with Experiment.
In: Proc. 28th Conf. on Ocean, Offshore and Arctic Eng. OMAE2009,
May 31-June 5, 2009, Honolulu, paper OMAE2009-79052.
(pdf)
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R. Luppes, J.A. Helder and A.E.P. Veldman,
The numerical simulation of liquid sloshing in microgravity.
In: H. De Coninck and E. Dick (eds.) Computational Fluid Dynamics 2006.
Springer, Berlin (2009) 607-612 (doi: 10.1007/978-3-540-92779-2_95)
-
P.R. Wellens, R. Luppes, A.E.P. Veldman and M.J.A. Borsboom,
CFD simulations of a semi-submersible with absorbing boundary conditions.
In: Proc. 28th Conf. on Ocean, Offshore and Arctic Eng. OMAE2009,
May 31-June 5, 2009, Honolulu, paper OMAE2009-79342.
(pdf)
-
R. Wemmenhove, B. Iwanowski, M. Lefranc, A.E.P. Veldman, R. Luppes and
T. Bunnik, Simulation of sloshing dynamics in a tank by an improved
Volume-of-Fluid method.
In: Proc. ISOPE 2009, 1st Sloshing Dynamics and Design Symposium,
Osaka, Japan, June 21-26 (2009) paper ISOPE2009-YHK-05
(pdf)
2008
-
B. Brodtkorb.
Prediction of wave-in-deck forces on fixed jacket-type structures
based on CFD calculations.
In: Proc. 27th Int. Conf. Offshore Mechanics and Arctic Eng.,
OMAE2008, Estoril, Portugal, June 15-20 (2008) paper OMAE2008-57346.
-
B. Brodtkorb.
Prediction of increased jacket substructure loads due to wave-in-deck
diffraction based on CFD calculations.
In: Proc. 27th Int. Conf. Offshore Mechanics and Arctic Eng.,
OMAE2008, Estoril, Portugal, June 15-20 (2008) paper OMAE2008-57361.
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T. Bunnik, P. Wellens and A. Veldman,
Prediction of extreme wave loads in focused wave groups.
In: Proc. Int. Symp. Offshore Polar Eng. ISOPE-2008,
Vancouver, 6-11 July (2008) paper TPC-175, 7 pages.
(pdf)
-
D.G. Danmeier, R.K.M. Seah, T. Finnigan, D. Roddler, A. Abault, M. Vache, and
J.T. Imamura.
Validation of wave run-up calculation methods for a gravity based structure.
In: Proc. 27th Int. Conf. Offshore Mechanics and Arctic Eng.,
OMAE2008, Estoril, Portugal, June 15-20 (2008) paper OMAE2008-57625.
-
R. Wemmenhove.
Numerical simulation of two-phase flow in offshore environments.
PhD thesis, University of Groningen, The Netherlands, 2008.
(electronic version)
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R. Wemmenhove, R. Luppes and A.E.P. Veldman,
Application of a VOF method to model compressible two-phase flow in sloshing
tanks.
27th OMAE Conference, Estoril, 16-19 June (2008).
Paper OMAE2008-57254, 10 pages.
(pdf)
2007
-
B. Buchner and T. Bunnik,
Extreme wave effects on deepwater floating structures.
OTC paper 18493, Houston, 2007.
-
T. Bunnik, A.E.P. Veldman and R.H.M Huijsmans,
LNG sloshing simulations and validation model tests.
In: J. Chung (ed.) Proc. ISOPE-2007, Lisbon, July 1-6 (2007).
-
A.E.P. Veldman, J. Gerrits, R. Luppes, J.A. Helder and J.P.B Vreeburg:
The numerical simulation of liquid sloshing on board spacecraft.
J. Comput. Phys. 224 (2007) 82-99.
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P.R. Wellens, J.A. Pinkster, A.E.P. Veldman and R.H.M. Huijsmans,
Numerical wave run up calculation on GBS columns.
In: J. Chung (ed.) Proc. ISOPE-2007, Lisbon, July 1-6 (2007).
-
P.R. Wellens, J.A. Pinkster, A.E.P. Veldman, and R.H.M. Huijsmans.
3D diffraction based boundary conditions.
In: R. Beck (ed.) Proc. NSH-2007, Ann Arbor, MI, USA, August 2007.
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R. Wemmenhove, R. Luppes, A.E.P. Veldman and T. Bunnik:
Numerical simulation of sloshing in LNG tanks with a compressible two-phase model.
In: Proc. 26th Int. Conf. Offshore Mech. Arctic Eng.,
San Diego (2007) paper OMAE2007-29294.
(pdf)
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R. Wemmenhove, R. Luppes, A.E.P. Veldman and T. Bunnik:
Numerical simulation and model experiments of sloshing in LNG tanks.
In: E. Onate, et al. (eds.) Proc. Int. Conf. Comp. Meth. Marine Eng. MARINE
2007, Barcelona (2007).
(pdf)
2006
-
B. Buchner, T. Bunnik and A.E.P. Veldman:
The use of a Volume of Fluid (VOF) method coupled to a time
domain motion simulation to calculate the motions of a subsea structure
lifted through the splash zone.
In: Proc. 25th Int. Conf. Offshore Mech. Arctic Eng.,
Hamburg, Germany (2006) paper OMAE2006-92447.
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T. Bunnik, B. Buchner, A.E.P. Veldman, M.-Y. Lee, T. Finnigan and A. Moises:
Numerical simulation of complex greenwater and wave loads on offshore
structures.
Offshore Technology Conference, Houston, 1-4 May (2006)
paper OTC 17853.
- F. Geurts:
Comflow and Amazon-sc: chalk and cheese -- A comparison of two numerical
methods for fluid flow.
Master thesis, University of Groningen, August 2006.
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T.B. Johannessen, S. Haver, T. Bunnik and B. Buchner:
Extreme wave effects on deep water TLP's -
Lessons learned from the Snorre A model tests.
In: Proc. Deep Offshore Technology 2006, Houston, Nov. 28-30 (2006).
-
R. Luppes, J.A. Helder and A.E.P. Veldman:
The numerical simulation of liquid sloshing in microgravity.
In: P. Wesseling, E. Onate and J. Periaux (eds.) Proc. Europ. Conf.
Comput. Fluid Dyn.: ECCOMAS CFD 06, Egmond aan Zee,
ISBN 909020970-0 (2006) paper 490.
(pdf)
-
S. Valsgard, T.K. Ostwold, O. Rognebakke, E. Byklum and H.O. Sele:
Gas carrier development for an expanding market.
In: Proc. Design, Construction and Operation of Natural Gas Carriers and
Offshore Systems, ISCOT 2006, Busan, Korea (2006) 15 pages.
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A.E.P. Veldman:
The simulation of violent free-surface dynamics at sea and in space.
In: P. Wesseling, E. Onate and J. Periaux (eds.) Proc. Europ. Conf.
Comput. Fluid Dyn.: ECCOMAS CFD 06, Egmond aan Zee,
ISBN 909020970-0 (2006) paper 492.
(pdf)
-
R. Wemmenhove, E. Loots and A.E.P. Veldman:
Hydrodynamic wave loading on offshore structures simulated by a two-phase
flow model.
In: Proc. 25th Int. Conf. Offshore Mech. Arctic Eng.,
Hamburg, Germany (2006) paper OMAE2006-92253.
(pdf)
-
R. Wemmenhove, E. Loots and A.E.P. Veldman:
Numerical simulation of hydrodynamic wave loading by a two-phase model.
In: P. Wesseling, E. Onate and J. Periaux (eds.) Proc. Europ. Conf.
Comput. Fluid Dyn.: ECCOMAS CFD 06, Egmond aan Zee,
ISBN 909020970-0 (2006) paper 517.
(pdf)
2005
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T. Bunnik and B. Buchner:
Simulation of the dynamic motions of complex sub-sea structures in the splash
zone during deepwater installations.
In: Proc. Deep Offshore Technology 2005, Vitoria (Brazil), November 8-10, 2005.
-
T. Bunnik and R. Huijsmans:
Validation of wave propagation in numerical wave tanks.
In: Proc. 24th Int. Conf. Offshore Mech. Arctic Eng.,
Halkidiki, Greece (2005) paper OMAE2005-67221.
-
B. Hak:
The numerical simulation of side launching of a ship.
Master thesis, University of Groningen, August 2005.
-
J.A. Helder:
Sloshing SloshSat FLEVO: Numerical simulation of coupled solid-liquid dynamics
in micro-gravity.
Master thesis, University of Groningen, September 2005.
-
B. Iwanowski and E. Falkenberg:
Investigation of fluid flow kinematics due to an incident regular wave in
presence of a large offshore gravity based platform.
In: P. Bergan et al. (eds.) Computational Methods in Marine Engineering,
CIMNE, Barcelona (2005) 313-322.
-
K.M.T. Kleefsman:
Water impact loading on offshore structures - a numerical study.
PhD thesis, University of Groningen (2005).
-
K.M.T. Kleefsman, G. Fekken, A.E.P. Veldman, B. Iwanowski and B. Buchner:
A Volume-of-Fluid based simulation method for wave impact problems.
J. Comp. Phys. 206 (2005) 363-393.
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K.M.T. Kleefsman, G.E. Loots, A.E.P. Veldman, B. Buchner, T. Bunnik and
E. Falkenberg:
The numerical solution of green water loading including vessel motions
and the incoming wave field.
In: Proc. 24th Int. Conf. Offshore Mech. Arctic Eng.,
Halkidiki, Greece (2005) paper OMAE2005-67448.
(pdf)
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A.E.P. Veldman, G. Fekken and K.M.T. Kleefsman:
Numerical simulation of hydrodynamic wave impact.
In: B. Oskam (ed.) Flow induced unsteady loads and the impact on
military applications. CD-Proceedings, RTO-AVT 123, Budapest (2005)
(pdf)
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A.E.P. Veldman, K.M.T. Kleefsman and G. Fekken:
Numerical computation of wave impact.
In: P. Bergan et al. (eds.) Computational Methods in Marine Engineering,
CIMNE, Barcelona (2005) 323-332.
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R. Wemmenhove, E. Loots, R. Luppes and A.E.P. Veldman:
Modelling two-phase flow with offshore applications.
In: Proc. 24th Int. Conf. Offshore Mech. Arctic Eng.,
Halkidiki, Greece (2005) paper OMAE2005-67460.
(pdf)
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R. Wemmenhove, G.E. Loots, R. Luppes and A.E.P. Veldman:
Simulation of green water loading by a three-dimensional two-phase numerical
model.
In: J. Grue (ed.) 20th Int. Workshop on Water Waves and Floating
Bodies. University Centre Svalbard, Spitsbergen (2005) 4 pages.
(pdf)
2004
-
T. Bunnik and B. Buchner:
Numerical prediction of wave loads on subsea structures in the splash zone.
In: J.S. Chung, K. Izumiyama, M. Sayed and S.W. Hong (eds.)
Proc. 14th Int. Offshore and Polar Engineering Conference ISOPE2004,
Vol. I, pp. 284-290 (2004).
-
T. Bunnik and B. Buchner:
Experimental investigation of subsea structures during installation and the
related wave loads, added mass and damping.
In: J.S. Chung, K. Izumiyama, M. Sayed and S.W. Hong (eds.)
Proc. 14th Int. Offshore and Polar Engineering Conference ISOPE2004,
Vol. I, pp. 291-296 (2004).
-
B. Buchner, G.E. Loots, G.Z. Forristall and E.J. van Iperen,
Hydrodynamic aspects of gravity based structures in shallow water.
In: Offshore Technology Conference, Houston, 3-6 May (2004)
paper OTC 16716. Also: Journal of Petroleum Technology (2005).
-
G. Fekken:
Numerical simulation of free surface flow with moving rigid bodies.
PhD thesis, University of Groningen (2004).
-
R.H.M. Huijsmans and E. van Groesen:
Coupling freak wave events with green water simulations.
In: J.S. Chung, K. Izumiyama, M. Sayed and S.W. Hong (eds.)
Proc. 14th Int. Offshore and Polar Engineering Conference ISOPE2004,
Vol. I, pp. 366-373 (2004).
- P. de Jong:
Numerical simulation of the side launching of a ship.
Master thesis, University of Groningen, March 2004.
-
K.M. Theresa Kleefsman, Arthur E.P. Veldman and T. Bunnik:
An improved Volume-Of-Fluid (IVOF) method for wave impact type problems.
In: Proc. OMAE Speciality Symposium on FPSO Integrity, Houston, paper
OMAE-FPSO04-0066 (2004).
(pdf)
-
K.M. Theresa Kleefsman and Arthur E.P. Veldman:
An improved Volume-Of-Fluid method for wave impact.
In: P. Neittaanmaki et al. (eds.) Proceedings ECCOMAS2004,
Jyvaskyla (2004). (pdf)
-
K.M. Theresa Kleefsman, Geert Fekken, Arthur E.P. Veldman and Bogdan
Iwanowski:
An improved Volume-Of-Fluid method for wave impact type problems.
In: J.S. Chung, K. Izumiyama, M. Sayed and S.W. Hong (eds.)
Proc. 14th Int. Offshore and Polar Engineering Conference ISOPE2004,
Vol. I, pp. 334-341 (2004).
(pdf)
-
E. Loots and B. Buchner:
Wave run up as important hydrodynamic issue for gravity based structures.
In: Proc. 23rd Int. Conf. Offshore Mech. Arctic Engng, Vancouver, paper
OMAE2004-51084 (2004). (pdf)
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E. Loots, B. Buchner, W. Pastoor and T. Tveitnes:
The numerical solution of LNG sloshing with an improved Volume-of-Fluid
method.
In: Proc. 23rd Int. Conf. Offshore Mech. Arctic Engng, Vancouver, paper
OMAE2004-51085 (2004). (pdf)
- G. Rozema:
Modeling and simulation of vehicles carrying liquid cargo.
Master thesis, University of Groningen, July 2004.
2003
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K.M.T. Kleefsman and A.E.P. Veldman:
Numerical simulation of wave loading on a SPAR platform.
In: A.H. Clement and P. Ferrant (eds.)
Proc. IWWWFB03, 18th International Workshop on Water Waves and Floating
Bodies, Le Croisic, April 2003. 4 pages.
-
G.E. Loots:
Fluid-structure interaction in hemodynamics.
PhD thesis, University of Groningen (2003).
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J. Gerrits and A.E.P. Veldman:
Dynamics of liquid-filled spacecraft.
J. Engineering Mathematics 45 (2003) 21-38.
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E. Loots, B. Hillen and A.E.P. Veldman:
The role of hemodynamics in the development of the outflow tract of the heart.
J. Engineering Mathematics 45 (2003) 91-104.
2002
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K.M.T. Kleefsman, G. Fekken, A.E.P. Veldman, B. Buchner, T.H.J. Bunnik,
B. Iwanowski:
Prediction of green water and wave loading using a Navier-Stokes based
simulation tool.
In: A. Naess et al. (eds.) Proceedings 21th ASME Offshore Mechanics and
Arctic Engineering, American Society of Mechanical Engineers, ISBN
0-7918-3611-8 (2002) paper 28480. (pdf)
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E. Loots, B. Hillen, H. Hoogstraten, A. Veldman:
Fluid-structure interaction in the basilar artery.
In: R. Herbin and D. Kroener (eds.) Finite Volumes for Complex
Applications III , ISBN 1-9039-9634-1,
Hermes Penton Science (2002) 607-614.
2001
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J. Gerrits:
Dynamics of liquid-filled spacecraft.
PhD thesis, University of Groningen (2001).
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B. Buchner, G. Fekken, T.H.J. Bunnik and A.E.P. Veldman:
A numerical study on wave run up on an FPSO bow.
In: Proc. 20th ASME Conf. Offshore Mech. Arctic Eng.,
Rio de Janeiro, Brazil (2001).
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J. Gerrits and A.E.P. Veldman:
Transient dynamics of containers partially filled with liquid.
In: B. Sarler and C.A. Brebbia (eds.) Moving Boundaries VI ,
WIT Press, Southampton (2001) pp. 63-72.
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E.F.G. van Daalen, K.M.T. Kleefsman, J. Gerrits, H.R. Luth and A.E.P. Veldman:
Anti-roll tank simulations with a volume-of-fluid based Navier-Stokes solver.
In:
Twenty-Third Symposium on Naval Hydrodynamics.
National Academy Press, Washington D.C. (2001) pp. 457-473.
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G. Fekken, K.M.T. Kleefsman, A.E.P. Veldman:
Numerical simulation of green water loading on the foredeck of a ship.
Poster presented at J.M.Burgersdag, Delft, January 2001.
(pdf)
2000
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E.F.G. van Daalen, J. Gerrits, G.E. Loots and A.E.P. Veldman:
Free surface anti-roll tank simulations with a volume of fluid based
Navier-Stokes solver.
In: T. Miloh and G. Zilman (eds.) Proc. 15th Int. Workshop on Water Waves
and Floating Bodies, Caesarea, Israel, Feb 27 - Mar 1, 2000.
(pdf)
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J. Gerrits and A.E.P. Veldman:
Numerical simulation of coupled liquid-solid dynamics.
In: E. Onate, G. Bugeda and B. Suarez (eds.) Proc. ECCOMAS 2000,
Barcelona (2000) paper 575.
(pdf)
-
T. Kleefsman:
Numerical simulation of ship motion stability by an activated U-tube anti-roll
tank. MSc-thesis, August 2000.
(pdf)
before 2000
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G. Fekken, A.E.P. Veldman and B. Buchner:
Simulation of green-water loading using the Navier-Stokes equations.
In: J. Piquet (ed.)
Proceedings 7th International Conference on Numerical Ship
Hydrodynamics, Nantes, 19-22 July 1999, pp. 6.3-1--6.3-12.
(ps.gz)
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J. Gerrits, G.E. Loots, G. Fekken, A.E.P. Veldman:
Liquid sloshing on earth and in space.
In: B. Sarler, C.A. Brebbia and H. Power (eds.) Moving Boundaries V.
WIT Press, Southampton (1999) pp. 111-120.
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Z. Sabeur, J.E. Cohen, J.R. Stephens and A.E.P. Veldman:
Investigation on free-surface flow oscillatory impact pressures with the
Volume-of-Fluid method. In: Numerical Methods for Fluid Dynamics VI
(M.J. Baines, ed.) Will Print, Oxford (1998) pp. 493-498.
(pdf)
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G. Fekken:
Numerical simulation of green water loading on the foredeck of a ship.
MSc-thesis, August 1998.
(pdf)
-
E. Loots:
Free surface flow in three-dimensional complex geometries.
MSc-thesis, August 1997.
Many animations of free-surface flow can be found at our
CFD gallery
To Computational
Fluid Dynamics home page
Department of Mathematics
University of Groningen