Recent content by adam walker

  1. A

    Gas pressure differentials and permeability

    Thanks for your opinion I find it most valuable. What we are designing does not need nitrogen – we only considered it because we thought it might extend the period before there was any loss of pressure; So - As a follow up: Assuming an air tight cylinder with two compartments Assuming both...
  2. A

    Gas pressure differentials and permeability

    Thanks for comment. I think I have phrased this all badly. The core issue is that oxygen diffuses through a material more easily than nitrogen. So my confusion relates to the degree to which the nitrogen on one side and the air on the other side would mix or exchange when the starting...
  3. A

    Gas pressure differentials and permeability

    We are trying to design a new product which uses gas pressures in various ways. We are a little foxed about partial pressures: Imagine a small cylinder; 6in long + 1in in diameter. The cylinder is made from steel. The cylinder is divided into two equal compartments – A and B. Each compartment...
  4. A

    How much time to pressure balance two air chambers

    Thank you for your reply. I am very poor with equations and so perhaps it would help if I reframed the question in simpler terms:NOTE: This is a question where all the elements are ideal; there is no need to consider real world issues e.g. temperature / flow resistance etc. A smooth tube 1mm in...
  5. A

    How much time to pressure balance two air chambers

    A smooth flexible tube 1mm in diameter and 1 foot in length holds air at normal / atmospheric pressure (14.7psi). the tube is open at one end. the other end is connected to a tank by an open valve. the tube is peristaltically compressed so all the air in the tube is forced into the tank. the...
Back
Top