Is It True That Ideal Fluids Always Flow from High Pressure to Low Pressure?

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SUMMARY

The statement "Ideal fluids always flow from high pressure to low pressure" is misleading. In fluid dynamics, particularly in the context of Bernoulli's principle, pressure and velocity are inversely related in a flow through a constriction. As fluid velocity increases in a constricted area, pressure decreases, demonstrating that flow does not strictly adhere to the high-to-low pressure rule. This highlights the importance of understanding the relationship between pressure and velocity in fluid mechanics.

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What's wrong with this statement: 'Ideal fluids always flow from high pressure to low pressure'? Could someone give me an example of where this is not true?
 
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syang9 said:
What's wrong with this statement: 'Ideal fluids always flow from high pressure to low pressure'? Could someone give me an example of where this is not true?

Isn't pressure related to velocity? When there is flow through a constriction isn't the pressure in a constriction lower due to the higher velocity? And on the other side then when it slows again?
 

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