Acceleration field, velocity field, pressure field

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Discussion Overview

The discussion centers around the concepts of acceleration field, velocity field, and pressure field within the context of fluid mechanics and fluid kinematics. Participants explore the mathematical and physical foundations of these concepts, as well as the necessary background knowledge for understanding them.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Homework-related

Main Points Raised

  • One participant expresses a lack of familiarity with acceleration, velocity, and pressure fields, suggesting they may belong to vector calculus.
  • Another participant asserts that these concepts are primarily physics-related and emphasizes the importance of understanding the concept of "field."
  • There are requests for recommendations on textbooks that explain these topics in a simple manner, along with inquiries about the necessary background knowledge.
  • Some participants mention specific textbooks, such as those by Munson, as resources that may touch on these topics.
  • One participant argues that the concept of a field does not require advanced calculus, describing it as a region in space where a quantity is defined and varies, while noting that operating on the field relates more to vector calculus.
  • There is a mention of the material derivative as a primary tool in fluid mechanics texts, which may be relevant to understanding these fields.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the mathematical requirements for understanding these concepts, with some emphasizing the physics aspect while others highlight the mathematical foundations. The discussion remains unresolved regarding the best approach to learning about these fields.

Contextual Notes

Some participants express uncertainty about the specific mathematical background needed and the depth of coverage in fluid mechanics texts. There are also references to examples in calculus that may relate to the discussion but lack specific details.

mech-eng
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I am not familiar with concepts of accelaration field, velocity field, pressure field. I have come up with them in the topic of fluid mechnanics called fluild kinematics. My mathematical background is poor. I would like to learn some information about this concepts. Surely they are mathematical concepts. What part of mathematics do they belong to? I think it is Vector Calculus. I will refresh my mathematical background as soon as possible as well.

Thank you.
 
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DrClaude said:
It's physics, not mathematics. First, you have to understand the concept of "field," see for instance https://en.wikipedia.org/wiki/Field_(physics)

Do you know textbooks explaining this topic in most simple way ? What background does this topic require?

Thank you.
 
DrClaude said:

Yes, fluid mechanics texts I think do not cover but mentions this topic with some applications but they are not very instructive. I remember in Stewart Calculus there was an example probably under topic vector analysis but I do not remember chapter or sequence name. It was an example of a wheel as a velocity fields. The velocity vectors were growing when they were going away from the center.

Thank you.
 
Last edited by a moderator:
I am honestly having a hard time grasping what you are struggling with here. The concept of a field, be it pressure, velocity, acceleration, or anything else, does not require advanced calculus. It is simply some region in space where that quantity is defined (and usually varies) at a variety of points in space. Now, operating on that field is more of a vector calculus topic, but any fluid mechanics text worth its salt will talk about the material derivative, which is the primary tool you need.
 
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