The discussion revolves around the calculation of airflow from a tube into the atmosphere, specifically focusing on whether it is possible to determine airflow using only the pressure and cross-sectional area of the tube. The scope includes theoretical considerations and practical applications related to fluid dynamics.
Participants do not reach a consensus on whether airflow can be calculated with just pressure and cross-sectional area, with multiple competing views and conditions being discussed.
Limitations include the need for additional parameters like tube length and temperature, as well as the assumptions made by calculators used in practical applications.
Are you talking about the upstream pressure? If so, you also need to know the length of the tube and the temperature (which determines the density and viscosity).enanthate said:Hi.
Is there any way to calculate airflow out of a tube (into atmosphere) with only the pressure and cross sectional area of the tube?
Chestermiller said:Are you talking about the upstream pressure? If so, you also need to know the length of the tube and the temperature (which determines the density and viscosity).
Then the answer to your original question is "no"enanthate said:Downstream.. Exit to atmosphere
Companies that make spray nozzles have calculators that will give you the flow rate given the pressure in the pipe leading to the nozzle (eg the upstream pressure) but they assume they are spraying into air (eg downstream pressure is 1 atmosphere).enanthate said:Hi.
Is there any way to calculate airflow out of a tube (into atmosphere) with only the pressure and cross sectional area of the tube?