About filters

Asking for help, no one responded, so why did I give a rating?

Please pay attention to the changes in the role of traffic.

This is because when the flow rate increases, the flow velocity becomes larger and the pressure loss becomes larger. It's not because the pressure loss is greater, the flow rate is greater, and the cause and effect relationship is not clear.

1 A friend on the first floor made an observation and study on the tabulated data and concluded the regularity of changes among pressure, pressure difference and flow rate, which is good. But maybe we don’t know enough about the laws of fluid flow, so we get the questions listed in the title. 2 As my friend on the 4th floor said, the author failed to fully understand the causal relationship when reading the tabulated data. The causal relationship is: After the hardware conditions and the physical properties of the fluid are determined, the resistance generated by the fluid flowing through the pipeline increases with the increase in flow rate 3. Therefore, the order of interpretation of the list should be: 3.1. Only when the inlet pressure as the driving force increases can the resistance drop be increased. ； 3.2. As the flow rate increases, the resistance drop through the filter of the same specification will increase.

Please note that I am talking about the same caliber and the same pressure without change. Why does the flow rate increase when the pressure loss increases?

I can understand what you are saying. What I'm confused about is that my premise said that the pressure and diameter of the pipe inlet are fixed. Why does the flow rate increase when the pressure loss in the table is large (doesn't the large pressure loss mean the resistance is large)?

1. Haha, we are ghosts wandering around before night falls:lol 2. There are different ways to solve problems. I have the same idea as the one on the 4th floor.: Looking at the results from the principle, it is very easy to solve this problem. 3. The poster’s way of thinking is to deduce the principle from the results backwards, so he hopes that masters will appear during the long night, and we are also waiting to communicate with each other.

With the same caliber and the same pressure, the greater the flow rate, the greater the flow velocity, and the greater the pressure loss. You've got the cause and effect relationship reversed. It's not that the flow rate increases because the pressure loss increases.

It's okay to think about it according to your idea. Why does the pressure loss increase when other conditions are constant? Because the flow rate increases. As the flow rate increases, the flow rate naturally becomes larger.