Recent content by JJ21

Hi guys, Currently just looking through a few concepts for wave energy converters and I noticed that a few designs use bi-directional rotating turbines (or linear action) meaning the alternator has to continuously keep rotating in one direction, stopping, rotating in the other direction...

Hi guys, Right, here is the situation. Consider a long coil of pipe containing water with a thermostatic valve at the outlet and a valve (this is the valve in question) at the inlet. The inlet is gravity fed by a large reservoir of water and the question is this: as the water leaves the...

Brilliant, thanks for you help. Just to maybe complicate this a little bit further, instead of a single cubic container it was a long coil pipe. Is there any way to calibrate the valve in order to let the water flow from the pipe through the outlet thermostatic valve while introducing a delay...

Hi all, Right, this may be a bit hard to explain but I'll do my best. Hopefully attached is a sketch of the situation. The water flows from the tank into the "rigid container" through valve (1). This tank is then heated until the water reaches boiling at which point the thermostatic valve...

Hi, I'm trying to get an expression for the shear rate in a rotating cylinder (as pictured) in terms of the inner cylinder radius, outside cylinder radius and angular velocity. The inside cylinder remains fixed and only the outer cylinder rotates. Assume that the distance x is small. Any...

Thanks for the ideas! I've been researching how to vary the stroke length of a slider-crank mechanism and have found a few methods but no "practical" solution of how the slider-crank could be adjusted in real life for example the slider-crank mechanism attached below. Any ideas? Thanks

Sorry, by linear oscillatory motion i meant reciprocating motion. It would be over several fixed ranges from 1mm to 3mm for example.

Hi, I need to get a precise linear oscillatory motion from a rotary input? Its for a compact carving tool. Any ideas on how to control the displacement? Thnks

Any ideas...?

A few things I don't quite get... about why the surface pressure distribution UPSTREAM of the separation point of a body is different to the theoretical or ideal distribution...? I can see why there will be a difference between the theoretical static pressure distribution but not why the...