Mechanical Engineering Exam > Mechanical Engineering Questions > Grashof number signifies the ratio of[2016]a)...
Start Learning for Free
Grashof number signifies the ratio of
[2016]
- a)inertia force to viscous force
- b)buoyancy force to viscous force
- c)buoyancy force to inertia force
- d)inertia force to surface tension force
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Grashof number signifies the ratio of[2016]a)inertia force to viscous ...
Grash of number = inertia force x 
Most Upvoted Answer
Grashof number signifies the ratio of[2016]a)inertia force to viscous ...
Grash of number = inertia force x 
Free Test
FREE
| Start Free Test |
Community Answer
Grashof number signifies the ratio of[2016]a)inertia force to viscous ...
The Grashof number is a dimensionless number used in fluid mechanics to characterize the ratio of buoyancy force to viscous force in a fluid flow. It is named after the German engineer Franz Grashof, who made significant contributions to the field of heat transfer.
The Grashof number is defined as the product of the buoyancy force and the characteristic length scale of the flow, divided by the product of the dynamic viscosity of the fluid and the thermal diffusivity. Mathematically, it can be expressed as:
Gr = (g * β * ΔT * L^3) / (ν^2)
Where:
- g is the acceleration due to gravity
- β is the coefficient of thermal expansion
- ΔT is the temperature difference across the flow
- L is the characteristic length scale of the flow
- ν is the kinematic viscosity of the fluid
The Grashof number is commonly used in the study of natural convection, which occurs when a fluid is heated from below and the resulting density difference causes the fluid to rise. In this case, the buoyancy force dominates the flow behavior compared to the viscous force.
Explanation of the options:
a) The inertia force to viscous force ratio is characterized by the Reynolds number, not the Grashof number.
c) The buoyancy force to inertia force ratio is not characterized by the Grashof number.
d) The inertia force to surface tension force ratio is characterized by the Weber number, not the Grashof number.
Therefore, the correct answer is option B, which states that the Grashof number signifies the ratio of buoyancy force to viscous force.
The Grashof number is defined as the product of the buoyancy force and the characteristic length scale of the flow, divided by the product of the dynamic viscosity of the fluid and the thermal diffusivity. Mathematically, it can be expressed as:
Gr = (g * β * ΔT * L^3) / (ν^2)
Where:
- g is the acceleration due to gravity
- β is the coefficient of thermal expansion
- ΔT is the temperature difference across the flow
- L is the characteristic length scale of the flow
- ν is the kinematic viscosity of the fluid
The Grashof number is commonly used in the study of natural convection, which occurs when a fluid is heated from below and the resulting density difference causes the fluid to rise. In this case, the buoyancy force dominates the flow behavior compared to the viscous force.
Explanation of the options:
a) The inertia force to viscous force ratio is characterized by the Reynolds number, not the Grashof number.
c) The buoyancy force to inertia force ratio is not characterized by the Grashof number.
d) The inertia force to surface tension force ratio is characterized by the Weber number, not the Grashof number.
Therefore, the correct answer is option B, which states that the Grashof number signifies the ratio of buoyancy force to viscous force.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Similar Mechanical Engineering Doubts
Top Courses for Mechanical EngineeringView all
Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer?
Question Description
Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer?.
Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Grashof number signifies the ratio of[2016]a)inertia force to viscous forceb)buoyancy force to viscous forcec)buoyancy force to inertia forced)inertia force to surface tension forceCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup