Buckingham PI Theorem proof - Dimensional Analysis

In summary, the Buckingham PI Theorem is a mathematical principle used in dimensional analysis that states a physical problem with n variables can be reduced to n-p dimensionless equations if the variables can be grouped into p dimensionless groups. Dimensional analysis is a method used to check equations and physical quantities by comparing their dimensions, and it involves creating dimensionless groups using the physical dimensions in a problem. The Buckingham PI Theorem is used in physics to simplify equations and problems, and it can be proved using basic algebra and dimensional analysis principles. It has practical applications in various scientific fields, such as determining relationships between physical quantities, estimating unknown parameters, and simplifying complex equations.
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Homework Statement


I am looking for a proof of Buckingham PI theorem in dimensional analysis, but can't really find one anywhere. I saw a proof involving posing the problem as a question in linear algebra, but it was quite unclear.
 
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Most books I have found gloss over the proof and fail to incorporate the relevant details.

The closest I have found to a formal proof (in a book) is in Barenblatt's "Scaling, self similarity, and intermediate asymptotics" chapter 0. Otherwise you'll have to look at Buckingham's original paper, "On physically similar systems; illustrations of the use of dimensional equations".
 

FAQ: Buckingham PI Theorem proof - Dimensional Analysis

What is the Buckingham PI Theorem?

The Buckingham PI Theorem, also known as the Buckingham-Pi theorem or simply the Pi theorem, is a mathematical principle used in dimensional analysis. It states that if a physical problem involves n variables and these variables can be grouped into p dimensionless groups, then the problem can be reduced to n-p dimensionless equations.

What is dimensional analysis?

Dimensional analysis is a mathematical method used to check the correctness of equations and physical quantities by comparing their dimensions. It involves identifying the physical dimensions involved in a problem and using them to create dimensionless groups, as described by the Buckingham PI Theorem.

How is the Buckingham PI Theorem used in physics?

The Buckingham PI Theorem is used in physics to simplify complex equations and problems by reducing the number of variables involved. This makes it easier to analyze and understand the relationship between different physical quantities. It is commonly used in fields such as fluid mechanics, thermodynamics, and electromagnetics.

Can the Buckingham PI Theorem be proved?

Yes, the Buckingham PI Theorem can be proved mathematically using basic algebra and dimensional analysis principles. It was first published by British physicist Edgar Buckingham in 1914 and has since been used extensively in various scientific fields.

What are the practical applications of the Buckingham PI Theorem?

The Buckingham PI Theorem has many practical applications in science and engineering. For example, it can be used to determine the relationship between physical quantities in a system, to estimate unknown parameters, and to simplify complex equations. It is also used in the design and analysis of experiments in various fields of research.

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