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Meaning of one-dimensional (1-D) flow in fluid mechanics Select the statement that best describes one-dimensional flow.

Difficulty: Easy

is steady and uniform
takes place in straight line
takes place in curve
takes place in one direction

Correct Answer: takes place in one direction

Explanation:

Concept/Approach
In 1-D flow, all primary flow properties are assumed to vary along a single spatial coordinate (one direction). The pathline may be curved locally; the key modeling assumption is the single predominant direction of variation.

Final Answer
takes place in one direction

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