Staff - School of Civil Engineering and the Environment

Academic Staff: Professor

Phone

023 8059 2843

Fax

023 8067 7519

E-mail

J.R.Chaplin@soton.ac.uk

Room

4037

Building

Division

Energy and Climate Change

Biography

John Chaplin works on flows that are both relevant to the offshore, coastal and sustainable energy engineering industries, and are examples of intrinsically interesting fluid mechanics. There are many of these, such as the case of a horizontal cylinder submerged beneath waves with its axis parallel to the wave crests. Close study of this situation reveals some astonishingly rich physics. The wave motion drives a boundary layer that is responsible for a steady re-circulating flow around the cylinder. This can have an important effect on the loading on some floating vessels, but it is also subject to a centrifugal instability which leads to the formation of large out-of-plane secondary vortices. Similar mechanisms occur in other wave-induced motions, including the formation and growth of certain patterns of sea-bed ripples.

Following this approach since the mid-1970s, John Chaplin has made many contributions to the understanding of wave/structure interactions, including recently the provision of high quality laboratory measurements of the vortex-induced vibrations of a tension riser (see www.civil.soton.ac.uk/hydraulics/riser). These data were subsequently adopted for validation purposes by 12 international groups who are developing methods of modelling this process numerically. Other interests include violent free surface motion generated for example by breaking waves, and the hydrodynamics of marine current turbines. John Chaplin is a member of the team working on the highly innovative wavepower converter, the Anaconda (see www.bulgewave.com)

Teaching

Modules taught by Prof. John Chaplin

Click here to view

Research Grants

Research Grants for Prof. John Chaplin

Click here to view

Publications

Journal Papers - Academic Journals

Click here to view

Conference Contributions - Refereed

Click here to view

Farley F.J.M, Chaplin J. R., Hearn G E, Rainey R.C.T., (2009). "Persistent modes for water waves and a bulge tube in a narrow channel." 24th International Workshop on Water Waves and Floating Bodies, Zelenogorsk, Russia

Chaplin J. R., Farley F.J.M, Rainey R.C.T., (2007). "Power conversion in the Anaconda WEC." 22nd International Workshop on Water Waves and Floating Bodies, Plitvice, Croatia

Blenkinsopp C.E., Chaplin J. R., (2007). "Validity of small-scale physical models involving breaking waves." Proceedings of the 22nd International Workshop on Water Waves and Floating Bodies , 13-16

Chaplin J. R., Farley F.J.M, Prentice M E, Rainey R.C.T., Rimmer S.J., (2007). "Development of the Anaconda all-rubber WEC." Proceedings of the 7th European Wave and Tidal Energy Conference, Porto, September 11-13, 2007

Bearman P W, Chaplin J. R., Fontaine E, Graham J M R, Herfjord K, Lima A, Meneghini J R, Schulz KW, Willden R H J, (2006). "Comparison of CFD predictions of multi-mode vortex-induced vibrations of a tension riser with laboratory measurements." Proceedings of the 6th International Conference on FSI, AE & FIV+N, ASME PVP Division summer meeting, July 23-27 2006, Vancouver, Canada , PVP2006-ICPVT11-93177

Batten W.M.J., Bahaj A. S., Molland A.F., Chaplin J. R., (2006). "Yawed Performance of Horizontal Axis Turbines in Marine Currents." The 2nd International Conference of Renewable Energy in Maritime Island Climates - Dublin, 26th - 28th April 2006. , 151-156

Bearman P W, Huera Huarte F J, Chaplin J. R., (2006). "The hydrodynamic forces acting on a long flexible circular cylinder responding to VIV." Proceedings of the 6th International Conference on FSI, AE & FIV+N, ASME PVP Division summer meeting, July 23-27 2006, Vancouver, Canada , PVP2006-ICPVT11-93896

Bourdier S, Chaplin J. R., (2006). "Vortex-induced vibrations of a rigid cylinder on non-linear elastic supports." Proceedings of the 6th International Conference on FSI, AE & FIV+N, ASME PVP Division summer meeting, July 23-27 2006, Vancouver, Canada , PVP2006-ICPVT11-93926

Blenkinsopp C.E., Chaplin J. R., (2005). "Measurements of air/water interfaces in plunging breaking waves." 20th International Workshop on Water Waves and Floating Bodies

Colicchio G., Chaplin J. R., (2005). "Numerical and experimental investigation of the flow field around a surface piercing plate." 20th International Workshop on Water Waves and Floating Bodies

Huera Huarte F J, Bearman P W, Chaplin J. R., (2005). "On the force distribution along the axis of a flexible circular cylinder undergoing multi-mode vortex-induced vibrations." Proceedings of the 4th Conference on bluff body wakes and vortex-induced vibrations

Batten W.M.J., Bahaj A. S., Molland A.F., Chaplin J. R., (2005). "Experimentally validated numerical method for the hydrodynamic design of horizontal axis tidal turbines." Proc. of the 6th European Wave & Tidal Energy Conference, Glasgow, UK 29th Sept - 2nd Oct 2005. , 39-46

Mouaze` D, Murzyn F, Chaplin J. R., (2004). "Turbulence at free surface in hydraulic jumps." Proceedings 2004 ASME Heat Transfer/Fluids Engineering Summer Conference , Paper HT-FED04-56077

Retzler C.H., Rainey R.C.T., Chaplin J. R., (2004). "Non-linear run-up on a vertical cylinder surface-piercing cylinder." Proceedings of the 23rd OMAE Conference, ASME Proceedings 23rd International Conference on Offshore Mechanics and Arctic Engineering, , OMAE2004-51549

Chaplin J. R., Bearman P W, Huera Huarte F J, Pattenden R J, (2004). "Laboratory measurements of vortex-induced vibrations of a vertical tension riser in a stepped current." Proceedings of the 8th International Conference on Flow-Induced Vibrations, Ecole Polytechnique, Paris, July 6-9, 2004, 2, 279-284

Chaplin J. R., Bearman P W, Fontaine E, Herfjord K, Isherwood M, Larsen C M, Meneghini J R, Moe G, Triantafyllou M S, (2004). "Blind predictions of laboratory measurements of a vortex-induced vibrations of a tension riser." Proceedings 8th International Conference on Flow-Induced Vibrations, 2, 285-290

Chaplin J. R., Mouaze` D, (2004). "Disturbed-laminar flow over an oscillating cylinder." XXI International Congress of Theoretical and Applied Mechanics, 15 - 21 August 2004, Warsaw, Poland , 401

Batten W.M.J., Bahaj A. S., Chaplin J. R., Molland A.F., (2004). "Hydrodynamics of Marine Current Turbines." Proceedings World Renewable Energy Congress (WREC-VIII) - Denver, USA, 29 Aug - 3 Sept 2004.

Hayashi K, Higaki F, Shigemura T, Chaplin J. R., (2003). "Vortex-excited vibration of a circular cylinder in planar oscillating flow." Proc. 12th Int. Offshore and Polar Engineering Conf. Kitakyushu, Japan, 13 (4), 266-273

Chaplin J. R., (2003). "Visualizations of wave-induced flow over ripples." Euromech 451: Sea wave bottom boundary layer

Chaplin J. R., Rainey R.C.T., (2003). "Wave breaking and cavitation around a vertical cylinder: Experiments and Linear Theory." 18th International Workshop on Water Waves and Floating Bodies, le Croisic

Chaplin J. R., Dunn D C, Peregrine DH, Mouaze` D, Murzyn F, (2003). "Turbulence at the free surface." 18th International Workshop on Water Waves and Floating Bodies, Le Croisic

Chaplin J. R., Colicchio G., Landrini M, (2003). "Level-set modeling of the two-phase flow generated by a surface piercing body." 18th International Workshop on Water Waves and Floating Bodies, Le Croisic

Chaplin J. R., Mouaze` D, Ourmieres Y, (2002). "Steady and unsteady flow in wave-induced boundary layers." 17th International Workshop on Water Waves and Floating Bodies, Cambridge , 139-142

Chaplin J. R., Landrini M, Colicchio G., (2002). "Level-set simulation of the vertical flow generated by a surface piercing body." 5th Numerical Towing Tank Symposium, Pornichet, France

Chaplin J. R., Schonberg T., (2001). "Computation of non-linear wave reflections and transmissions from a submerged horizontal cylinder." 11th International Offshore and Polar Engineering Conference, Stavanger, 3, 280-287

Chaplin J. R., (2001). "The bow wave of a vertical surface piercing cylinder in a steady current.." Proc. 16th Int. Workshop on Water Waves and Floating Bodies, Fukuoka , 13-16

Schonberg T., Chaplin J. R., (2001). "Non-linear wave interactions with a submerged horizontal cylinder." Proceedings 11th International Offshore and Polar Engineering Conference, Stavanger, Norway, 3, 272-279

Chaplin J. R., Teigen P., (2000). "Drag on a vertical cylinder at a free surface." Proceedings IUTAM Symposium on Bluff Body Wake s and Vortex-Induced Vibrations, Marseille

Mendes A.C., Kishev R., Chaplin J. R., Tomchev P., (2000). "Experimental determination of the hydrodynamic loading on a model of offshore platform in waves and current." Proceedings 10th International Conference on Offshore and Polar Engineering, 1, 196-203

Retzler C.H., Chaplin J. R., Rainey R.C.T., (2000). "Transient motion of a vertical cylinder: Measurements and computations of the free surface." Proceedings 15th International Workshop on Water Waves and Floating Bodies, Tel-Aviv University , 154-7

Conference Contributions - Other

Click here to view

Hearn G E, Chaplin J. R., (2008). "The Fluid Structure Interaction of Wave Energy Devices: Some Old and Some New Theoretical and Experimental Challenges." THE ROYAL INSTITUTION OF NAVAL ARCHITECTS CONFERENCE ON MARINE RENEWABLE ENERGY

Chaplin J. R., Ikeda Y, (1999). "Viscous forces on offshore structures and their effects on the motion of floating bodies." 9th International Conference on Offshore and Polar Engineering, 3, 1-11

Chaplin J. R., Retzler C.H., Rainey R.C.T., (1999). "Waves generated by a vertical cylinder moving in still water." 14th International Workshop on Water Waves and Floating Bodies, University of Michigan at Ann Arbor, 1, 21-24

Chaplin J. R., (1998). "History Forces on a cylinder resulting from an impulsive change in the direction of the incident flow." Summer Annual Meeting,ASME Fluids Engineering Division, Washington DC

Chaplin J. R., (1997). "Hydrodynamic damping of cylinders in still water, in currents and in oscillatory flow." International Workshop on Environmental Loading on Offshore Structures, Covilha, Portugal

Chaplin J. R., Bao X L, (1997). "Forces on a large cylinder in an elliptical orbital flow." Conference on Modern Mechanics and Advancement of Science and Technology in Society, Beijing , 527-532

Chaplin J. R., (1996). "On the mechanics of ringing in offshore structures." International Conference in Ocean Engineering, COE'96,IIT Madras, India , 717-725

Chaplin J. R., Subbiah K, (1996). "Wave and current loads on large scale horizontal cylinders." International Conference in Ocean Engineering,COE'96,IIT Madras, India , 199-203

Chaplin J. R., Retzler C.H., (1996). "Forces on a horizontal cylinder in waves and currents." International Conference in Ocean Engineering, COE'96,IIT Madras, India , 204-209

Chaplin J. R., Subbiah K, Irani M, (1995). "Loading on a vertical cylinder near mean water level in long-and-short-crested waves." 5th International Conference on Offshore and Polar Engineering, 3, 324-331

Chaplin J. R., Bearman P W, Graham J., Subbiah K, Otta A., Mackwood P, Wouters J, (1994). "Loading on a cylinder at large scale in irregular waves with currents." International Symposium: Waves- physical and numerical modelling, UBC Vancouver, 1, 1133-1142

Chaplin J. R., Lakkoju V N M R, (1994). "Loading and response of a compliant cylinder in oscillatory flows at higher Reynolds numbers." International Symposium: Waves- physical and numerical modelling, UBC Vancouver, 3, 1213-1222

Chaplin J. R., (1993). "Pressure distributions on a cylinder in oscillatory flow at high Reynolds numbers." IUTAM Aymposium on Bluff-body wakes, dynamics and istabilities, Gottingen,Springer-Verlag , 119-122

Chaplin J. R., Subbiah K, Irani M, (1992). "Local Forces on a vertical cylinder in regular and irregular waves." 2nd International Conference on Offshore and Polar Engineering, 3, 391-397

Chaplin J. R., Flintham T P, (1992). "Breaking wave forces on tubulars in Recent developments in jack-up platforms." L Boswell and C D Mello (eds) Blackwell Scientific , 246-265

Chaplin J. R., Hayashi K, (1991). "Damping of a vertical cylinder oscillating in still water." 1st International Conference on Offshore and Polar Engineering, 3, 346-353

Chaplin J. R., (1990). "Computation of step waves on a current with strong shear near to the surface in Water wave kinematics." A Torum and O T Gudmestad (eds), Kluwe , 429-436

Chaplin J. R., (1990). "The computation of non-linear waves on a current of arbitrary non'uniform profile." Department of Energy Report

Chaplin J. R., Hayashi K, (1989). "Lift forces on a rigid vertical cylinder in waves." 8th International Conference on Offshore Mechanics and Polar Engineering, 2, 279-287

Chaplin J. R., (1988). "Loading on horizontal cylinders in irregular waves at the Christchurch Bay Tower and at the Delta Flume." Department of Energy Report

Chaplin J. R., (1988). "Non-linear forces on horizontal cylinders in the inertia regime in waves at high Reynolds numbers." 5th International Conference on Behaviour of Offshore Structures , 504-518

Chaplin J. R., (1987). "Hydrodynamic loading: some recent developments in wave loading on offshore structures." International Symposium on The problems of structure strength in Marine Technology, Yugoslav Academy of Arts and Sciences, Zagreb, April 1987

Chaplin J. R., Bearman P W, Graham J., Kostense J K, Klopman G, (1985). "The loading on a cylinder in post-critical flow beneath periodic and random waves." 4th International Conference on Behavior of Offshore Structures , 213-225

Chaplin J. R., Holmes P., Tickell R G, (1983). "Wave loading and structural response." Conference on the design and construction of offshore stuctures, Insitution of Civil Engineers, London , 1-10

Chaplin J. R., Tickell R G, Anastasiou K, (1982). "The non-linear properties of random wave kinematics." 3rd International Conference on the Behaviour of offshore structures , 493-515

Chaplin J. R., (1981). "Boundary layer seperation from a cylinder in waves." International Symposium on Hydrodynamics in Ocean Engineering, Norwegian Institute of technology , 645-666

Chaplin J. R., Anastasiou K, (1980). "Implications of some recent developments in gravity wave theories." 17th International Conference on Coastal Engineering,ASCE , 31-49

Chaplin J. R., Holmes P., (1979). "Wave loads on horizontal cylinders." 16th International Conference on Coastal Engineering, Hamburg,ASCE , 2449-2460

Commissions

Click here to view

Unspecified Type of Publication

Click here to view

Prof. John Chaplin BSc PhD