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Howto:Modelling hydrodynamics in JSBSim: Difference between revisions
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Howto:Modelling hydrodynamics in JSBSim (view source)
Revision as of 19:13, 5 December 2016
, 5 December 2016→Modelling hydrodynamics
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[[File:GfsView3d.jpg|thumb|600px|center|One Gerris buoyancy case for a float of the MFI-9B float-plane visualized in the Gerris gfsview3d tool. The water line is at the edge of the dark blue colour. It looks curved due to the various levels of cell refinement over the domain.]] | [[File:GfsView3d.jpg|thumb|600px|center|One Gerris buoyancy case for a float of the MFI-9B float-plane visualized in the Gerris gfsview3d tool. The water line is at the edge of the dark blue colour. It looks curved due to the various levels of cell refinement over the domain.]] | ||
== Modelling | == Modelling hydrodynamic coefficients == | ||
The hydrostatic coefficients described above allow the vessel to float, so the next problem is to make it move through the water. Starting with drag there are different modes of movement through the water, namely | |||
* displacement, the vessel pushing through the water; | |||
* planing, the vessel skimming along the surface of the water pushing down on it rather than through it; and | |||
* semi-planing, a mix of the above. | |||
For a non-planing vessel the drag is roughly proportional to the square of the speed through the water. | |||
''''To be continued... '''' | ''''To be continued... '''' | ||