Flow rate/pressure in a venturi

AI Thread Summary
As flow rate increases in a venturi, the pressure difference between the non-constricted and constricted sections also increases. This phenomenon is explained by Bernoulli's principle, which states that an increase in fluid velocity results in a decrease in pressure. In a venturi, as the fluid enters the constricted section, its velocity rises, leading to a drop in pressure. The greater the flow rate, the more pronounced this effect becomes, resulting in a larger pressure difference. Understanding this relationship is crucial for applications involving fluid dynamics and venturi designs.
GBA13
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Homework Statement


Hi Guys,

I have found that as flow rate increases the pressure difference in the sections of the venturi increases. Would someone please mind explaining in words why as I'm not sure.

Homework Equations

The Attempt at a Solution


Well I know that when the fluid gets to a constricted section the velocity increases and the pressure decreases but I'm not sure why the pressure difference between the non constricted section and the constricted section increases with increased flow rate.

Thanks very much
 
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GBA13 said:

Homework Statement


Hi Guys,

I have found that as flow rate increases the pressure difference in the sections of the venturi increases. Would someone please mind explaining in words why as I'm not sure.

Homework Equations

The Attempt at a Solution


Well I know that when the fluid gets to a constricted section the velocity increases and the pressure decreases but I'm not sure why the pressure difference between the non constricted section and the constricted section increases with increased flow rate.

Thanks very much
Think Bernoulli: p + ρv2 = constant if there is no change in potential energy
 

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