Christina 0 Report post Posted August 11, 2021 Greetings. I am currently doing bulbous bow optimization by using FFD. But i unable to figure out how do i alter the shape of the bulbous bow but maintain the volume. For example, i would like to extend the length of the bulbous bow but it will affect the volume of the bulbous bow. I hope anyone could give me any idea in this. Thank you in advance. Share this post Link to post Share on other sites
Mr. Heinrich von Zadow 5 Report post Posted August 11, 2021 Hi Christina, what you need is a design variable that gives you control over the volume, without changing the length. i.e. the beam of the bulbous bow should work fine. You then need to set up a nested optimization (for example a Brent) that adjusts the beam to match the target volume. You should find plenty of material about these so called "nested optimizations" if you search the forum. Cheers, Heinrich Share this post Link to post Share on other sites