CFD/theory/experiment ideas to demo to kids
 

Hi,

I need to demonstrate to some kids a fluids experiment which I can match the data with both CFD and theory (hand-calculation from analytical methods) and show how all 3 are used together. Since I don't have much funds for this I need to do it cheaply and I don't have access to a wind tunnel either. Something like Stoke's flow of a small sphere in syrup. I've also got to do this for FEA, so thought about bending and twisting of a beam.

Can anyone suggest some other ideas for this?

Thanks

i'd say something like heavy fluid on top, light fluid on bottom. or, for the best show, you can play with tixotropic fluids (water + amid), but i guess that the cfd part would be tricky.

Something involving a simple incompressible flow? So maybe look at what examples are used in intro to fluid dynamics text books?

Otherwise maybe do a scaling of a full scale model (Pi numbers & non dimensional numbers) of a flow of water over a dam wall or through a narrowing in a channel as this demonstrates theory, calibration and should go well in the CFD if you keep it a laminar flow. Maybe try laminar flow around a shape that has a known coefficient of drag in a similar situation?