Recent content by RichB2

Based on the weight we will be applying to the system, it will be rather large. We think it may be best to disregard the viscous forces. We really just want to know how much pushback we will get from decreasing the exit area.

Because the area change limits the flow out of the piston, we assume there is a force pushing back. We're thinking about a syringe: the smaller the opening, the harder you will have to push the plunger to keep the same flow rate out. So, if the force is kept constant, as we plan to do, changing...

Here's a quick diagram. Again, trying to figure out how A2 resists the flow. The goal is the get the resistive force in terms of A2 so that we can control acceleration. Going to make a freebody once we understand the force. Edit: can't see the image showing up, so here's the imgur link...

Right, so that's how our equation is set up right now, except we have a pressure term on the piston side, in terms of the weight of the test article and the area of the piston. Also got the constant flow rate portion, so our exit velocity (Vvent) is in terms of our dependent variable Avent. This...

So I'm working on a method to allow control of a drop at different speeds. An idea my team had was to sit our test object on top of a piston, and drop the object by allowing the piston/plunger to drain out of a port at the bottom. We can't seem to wrap our heads around how the size of the...