https://forums.autodesk.com/t5/cfd-forum/estimating-drag-force-at-the-level-of-water/m-p/13258746#M175 <P>You cannot do two liquids at the same time without a "solid" boundary between them. I've seen folks create a thin "solid" film between two fluids that is fully transmissible, but it may not capture the wave physics you're looking for. If you are running a free surface analysis, then that won't be an option at all.&nbsp;</P> Tue, 14 Jan 2025 00:07:46 GMT chris_smith1 2025-01-14T00:07:46Z https://forums.autodesk.com/t5/cfd-forum/estimating-drag-force-at-the-level-of-water/m-p/13097603#M174 <P>Hello,</P><P>I'm doing a university project in which I want to observe the impact of a change in the shape of the hull of a rowing boat on the physiology of the rower.</P><P>To do this, I would like to estimate the drag force of the boat for my two types of hull in an attempt to observe a reduction in drag force.</P><P>I'm having difficulty simulating the fact that the boat is at the air/water interface.</P><P>Do you know a way of estimating the drag force at the interface between 2 liquids on Autodesk products?</P><P>Thank you in advance for your help.</P> Mon, 21 Oct 2024 12:31:25 GMT https://forums.autodesk.com/t5/cfd-forum/estimating-drag-force-at-the-level-of-water/m-p/13097603#M174 paul_cousinie 2024-10-21T12:31:25Z https://forums.autodesk.com/t5/cfd-forum/estimating-drag-force-at-the-level-of-water/m-p/13258746#M175 <P>You cannot do two liquids at the same time without a "solid" boundary between them. I've seen folks create a thin "solid" film between two fluids that is fully transmissible, but it may not capture the wave physics you're looking for. If you are running a free surface analysis, then that won't be an option at all.&nbsp;</P> Tue, 14 Jan 2025 00:07:46 GMT https://forums.autodesk.com/t5/cfd-forum/estimating-drag-force-at-the-level-of-water/m-p/13258746#M175 chris_smith1 2025-01-14T00:07:46Z