I'm not sure I'm right but what you said below agrees with my perception. At least if you mean that the rotation at the crest would be opposite the direction of {flow}travel. Had me confused when I thought you meant hull travel. -----Original Message----- From: John Winters <735769_at_ican.net> To: 'Paddlewise' <> Date: Saturday, May 29, 1999 5:21 PM Subject: Re: [Paddlewise] Pro's and Con's of the "Swede Form" > >As I think about it this something comes to mind. The waves created travel >in the same direction as the hull. That means that the rotation at the >crest would be opposite the direction of travel. We know that the flow >along the hull travels from front to back from our flow experiments. But, >suppose the flow in the waves at the crest acts to retard the flow along >the hull thus increasing the potential energy and then in the troughs tends >to augment the flow because the trough motion acts in the same direction as >the hull flow. This satisfies the flow regime (faster in the troughs where >pressure decreases) slower in the crests (where pressure increases) even >though the flow in the waves acts a distance from the hull and it also >satisfies the flow in the created waves. > >An interesting thing about this comes to mind in that Leo Lazauskas (author >of the CFD program Michlet) says you cannot rely upon wave size predictions >close to the hull and perhaps this helps to explain why. Couple these >opposing flows with turbulent flow aft etc and you might get a real mess. > >I think you have hit on something, Matt, that I had not thought of before. > >Who says these things aren't productive. Glad you stuck to your guns on >this one, Matt. > >Cheers, >John Winters >Redwing Designs >Specialists in Human Powered Watercraft >http://home.ican.net/~735769/ > > > > > >*************************************************************************** >PaddleWise Paddling Mailing List >Submissions: paddlewise_at_lists.intelenet.net >Subscriptions: paddlewise-request_at_lists.intelenet.net >Website: http://www.gasp-seakayak.net/paddlewise/ >*************************************************************************** *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.gasp-seakayak.net/paddlewise/ ***************************************************************************
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