Recent content by mattie

Ah, that makes it clearer for me. the reason I split up the interactions is because both processes work independently from each other. one of them reduces the volume, and the other reduces the mass of the gass. And since each small time step is calculated individually, the volume and pressure...

Yes, I use the one inside of the chamber, because it's this air that moving outwards. I split the interaction into 2 processes. 1 process reduces the size of the chamber following a pre-determined path. And then there's the one I posted here, which consists of air flowing outwards. Both have a...

It calculates the volume flow rate using the inside pressure, outside pressure, and density inside of the chamber. The air density in the chamber is assumed to be known. The mass flow rate would be density multiplied by the volumetric flow, and the specific volume would be 1 divided by the...

I'm making this assumption as this is a part of a more complex system, which is not of importance to this part in particular. The air flow is modeled as a function of pressure and air density. \dot{V}=A\cdot C \sqrt{\frac{2(p_{in}-p_{out})}{\rho}} The system is solved using a Matlab ODE...

Thanks for your reply. The heat transfer is indeed assumed to be negligible. As the density of the air flowing out, as well as the density of the air in the vessel are the same, I've assumed that ΔV̇/V = Δv̇ /v Is this assumption also correct? Also: On what grounds can I justify using an...

I'm trying to model the rate of change of the pressure in a pressurized rigid chamber with normal air (assumed to be an ideal gas). It has an air outflow V̇ (m^3/s) with ρ1. What's the change in p between state 1 and state 2? My assumption is that it can be modeled like an adiabatic expansion...