adjoint-based optimization

A description of adjoint-based optimization applied to Fluid Mechanics, using the flow over an airfoil as an example

[aflofo]

This is probably the most comprehensive explanation of how adjoint optimizations work. Everyone else wants to jump right into the math without giving a good intuitive understanding about what is going on first.

[indukantdeo]

A really helpful description of adjoint-based optimization

[OnshapeInc]

Very interesting presentation! Thanks for sharing.

[thibautdalemans]

Hello, I really enjoyed the video and it is very good basic explanation of the adjoint method. Do you have some references where the concepts that you mention are explained? Thank you in advance.

[rafaeltannenberg]

Thanks for the very good explanation! Would it be possible to compute the derivatives directly for the lift/drag-ratio rather then doing it independently for the two quantities? I assume that would reduce the required computational effort further (by the cost of one foward function evaluation)?

[sechristen]

I'm confused about why it's more efficient to solve for how the lyft/drag changes with respect to each flow variable. Are you solving a PDE for each flow variable? Or does it have something to do with how you evaluate the lift/drag from the flow variables?


Thank you! Lovely explanation of concept.

[cvspvr]

why do we use the reynold's number? it seems like an arbitrary simplification that should be the result of the calculations rather than be used by the calculations

[ninepuchar]

May i ask what software are you using for this? And could you provide the file for simulation so that we can check how is it done? or perhaps a simulationvideo demonstrating the adjoint-based optimisation . Thank you

[chrishermans]

So essentially, this boils down to backpropagation, as performed in neural networks...

[muhammadsarmad]

Where can I find the literature related to this example

[qr-ecvd]

this is just analytical partial derivations, right?

[muhammadusmanshahid]

Hey, Please answer my query as soon as possible. I really need it on urgent basis. For finding how flow variables are changing with respect to every parameter, wouldn't you need to solve 200 times by changing those 200 parameters one by one??