题目
BH40A1401 Fluid Mechanics I - Contact teaching, Lappeenranta 6.1.2025-23.2.2025 Quiz 2
多项选择题
Flow is steady, when
选项
A.a. flow velocity in a pipe is inversely proportional to flow area.
B.b. volumetric flow rate into a container equals volumetric flow rate out of the container, and the fluid is incompressible.
C.c. a container is filled slowly.
D.d. mass flow rate into a container equals mass flow rate out of the container.
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标准答案
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思路分析
We are evaluating when flow is steady, given a set of statements about flow behavior.
Option a: 'flow velocity in a pipe is inversely proportional to flow area.' In a steady, incompressible flow, continuity implies that the volumetric flow rate Q is constant along a pipe, Q = A*v. Therefore, if the cross-sectional area A decreases, the velocity v must increase p......Login to view full explanation登录即可查看完整答案
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