【Q&A Question 172】2017.06.21
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This post was last edited by 955559 on 2017-7-21 at 23:08. [Q&A Question 172] June 21, 2017: What are the reasons for liquid resistance? The reference answers can be seen after *replying*; points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) (1) It is related to the viscosity of the fluid; (2) it is related to the flow of the fluid; (3) it is related to the flow velocity of the fluid – the resistance loss is proportional to the square of the velocity; (4) it is related to the geometric dimensions of the pipeline and the degree of surface roughness. Scoring criteria: 2 Wealth points for incorrect responses; *incomplete* answers earn 3–8 points. 10 Wealth points for correct answers, provided along with a detailed explanation; responses that are correct but lack sufficient details earn 15–20 Wealth points. Please score according to these criteria. Note: If there are editing records after answering, only points will be awarded to those who participated. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have nothing to do with the answer are all considered malicious spamming; points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html
(1) It is related to the viscosity of the fluid; (2) it is related to the way in which the fluid flows; (3) it is related to the flow velocity of the fluid, as the loss of resistance is proportional to the square of the velocity; (4) it is related to the geometric dimensions of the pipeline and its surface roughness.
1. It is related to the viscosity of the fluid. 2. It is related to the flow of the fluid. 3. It is related to the flow velocity of the fluid; the loss of resistance is proportional to the square of the velocity.
There are two types of resistance exerted by a fluid on an object: one is the viscous resistance caused by the viscosity of the fluid, and the other is the pressure difference resistance resulting from the difference in flow velocity of the fluid around the object. Fluid resistance is related to the fluid’s viscosity, the Reynolds number, and the shape and size of the object
Elbow, necking, uneven surface, air resistance
(1) It is related to the viscosity of the fluid. (2) It is related to the flow of the fluid. (3) It is related to the flow velocity of the fluid; the loss of resistance is proportional to the square of the velocity.
Turbulence occurs within the fluid, and there is inherent resistance, similar to viscosity. There is friction between the fluid and the pipe, as the pipe surface is not smooth
Internal friction is the fundamental cause of fluid resistance, while the flow conditions of the fluid are the second major factor contributing to fluid resistance.
1. It is related to the viscosity of the fluid; 2. It is related to the flow state of the fluid; 3. It is related to the flow velocity of the fluid, as the resistance loss is proportional to the square of the velocity; 4. It is related to the geometric dimensions of the pipeline and the degree of surface roughness.