According to Bernoulli's principle for steady horizontal fluid flow, what occurs in a region where fluid velocity increases?
Answer and explanation
Correct answer: D. Static fluid pressure decreases
- Step 1: Bernoulli's equation for horizontal flow: P + (1/2) rho v^2 = constant. Step 2. When velocity v increases, dynamic pressure (1/2 rho v^2) increases. Step 3. Therefore, static pressure P must decrease to maintain a constant sum. Answer: Static fluid pressure decreases. Why not the others: Pressure decreases, which generates aerodynamic lift on airfoils.
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