Nicole Sharp <p><a class="" href="https://fyfluiddynamics.com/wp-content/uploads/2Dwatermagic1.png" rel="nofollow noopener noreferrer" target="_blank"></a></p> <p><a class="" href="https://fyfluiddynamics.com/wp-content/uploads/2Dwatermagic2.png" rel="nofollow noopener noreferrer" target="_blank"></a></p> <p><a class="" href="https://fyfluiddynamics.com/wp-content/uploads/2Dwatermagic3.png" rel="nofollow noopener noreferrer" target="_blank"></a></p> <p></p> <p>Once again Steve Mould is putting his prototyping skills to use to work out what goes on inside tricky containers. Here he looks at a “magic” wizard’s cup where — like the assassin’s teapot — cleverly placed holes in the side of the cup can block or allow air’s escape. In the wizard’s cup this lets the wizard refill the cup at will. </p><p>He also takes a look at how draining works, using tracer particles and a video editing effect that “echoes” previous frames in a video. For the tracer particles, this algorithm effectively visualizes pathlines in the flow. Areas with faster-moving fluid have longer pathlines that are closer together, whereas slow-moving regions have short pathlines. (Video credit: S. Mould)</p><p><a href="https://fyfluiddynamics.com/2024/07/playing-with-water-in-2d-containers/" class="" rel="nofollow noopener noreferrer" target="_blank">https://fyfluiddynamics.com/2024/07/playing-with-water-in-2d-containers/</a></p><p><a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/flow-visualization/" target="_blank">#flowVisualization</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/glugging-instability/" target="_blank">#gluggingInstability</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/pathlines/" target="_blank">#pathlines</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/pressure/" target="_blank">#pressure</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/surface-tension/" target="_blank">#surfaceTension</a></p>