Is there any way to slow down the flow of gas?

Let the gas flow slowly: reduce the gas flow rate; Make the pipe wall smooth and flat; Rotate the gas, or rotate the pipe.

Usually, the flow is controlled by pressure reducing valve, flowmeter and regulating valve. In chemistry, extra inert gas is often used for dilution, which can also achieve the purpose of reducing the rate of introducing reaction gas. Because the rate of chemical reaction is related to temperature, the higher the temperature, the faster the molecular movement, and the lower the temperature, the slower the molecular movement, so the speed can be reduced.

Gas-generated velocity flow

The mechanical model and basic equation of gas flow in two different regions are different from that in porous media region, and some flow parameters are discontinuous at the interface between the two different regions, which brings difficulties to the analysis and calculation of the problem.

In order to simplify the analysis and calculation, the method of region processing is generally adopted in engineering, that is, the basic equations are written in the free space region and the porous medium region respectively, and different basic equations are analyzed and solved in different regions respectively.