Use of bulk modulus in dimensionless numbers The value of bulk modulus of a fluid (or equivalently speed of sound) is required to evaluate which engineering number? Choose the correct option.
Mechanical Engineering
Hydraulics and Fluid Mechanics
Difficulty: Easy
Choose an option
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AReynolds number
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BFroude number
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CMach number
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DEuler number
Answer
Correct Answer: Mach number
Explanation
Concept/Approach
- Mach number M = V / c, where c = speed of sound = √(bulk modulus / density). Hence bulk modulus is essential for compressibility/sonic effects captured by Mach number.
Final AnswerMach number