# Advice on coupled panel method

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 October 6, 2018, 12:20 Advice on coupled panel method #1 New Member   Join Date: Oct 2018 Posts: 1 Rep Power: 0 Could anyone give me some pointers on how to write a panel method that can be monolithically coupled with a structural model I have already written? Background: The lifting surface in the structural model is a sail-like membrane (a 2D surface in 3D space) which consists of a triangular mesh and displacements and pressures specified for each node. I can already solve this system for a given pressure field by supplying an extra n equations (or rather a residual function with n outputs that must be zero'd). I would like these extra n equations to come from a panel method instead. I have already written a vortex lattice type of panel method. But I believe the fact there is one unknown and one collocation point per panel, not per node, is a problem. Would you agree? And can I instead do something based on at least 1st order doublet distributions? My primitive thoughts so far: Specify the doublet strength at each node. For 1st order doublet panels, the velocity is still infinite at the nodes(?) so I can't simply have collocation points at the nodes. Can I do a weighted residual integral type thing instead? Or use 2nd order doublet panels - Plotkin & Katz refer to a NASA paper by Johnson but it's too complicated for me to follow. Does this sound like the right approach? Any pointers? Thanks

 Tags coupled, doublet, fsi, panel method, vortex lattice method

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