![]() If, on the other hand, the maximum displacement is large and a high polynomial order is used, issues with the mesh quality are guaranteed to arise, so you have to find a balance. If the displacement is small and first-order polynomials are used, the lines will stay straight and move little, leading to a marginal improvement of the objective function. ![]() Thus, the number that is maximized is the diodicity, Di, defined as This is exemplified in the Optimization of a Tesla Microvalve tutorial model. You can consider having the same pressure drop for the two flow directions and optimizing the flow rate ratio, but depending on the context, it might be more relevant to fix the flow rate ratio and optimize the pressure drop ratio. Therefore, the devices can be used as leaky valves that are very robust, owing to the lack of moving parts. Tesla valves are devices with large anisotropic flow resistance i.e., it is significantly easier to push the fluid through in one direction compared to the other direction. ![]() In this blog post, we show how to use the shape optimization features available as of COMSOLĀ® version 5.5 to improve on a simple design inspired by the more complex topology optimization result. The setup of this optimization problem was simplified with the introduction of the Density Model feature as of COMSOLĀ® version 5.4. You can use topology optimization to get ideas for the device geometry early on in the design phase, for example, when designing a Tesla microvalve.
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