Questions tagged [fluid-dynamics]

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2 votes
1 answer
121 views

What motivated scientists to define quantities at a point?

We know that quantities can be defined at a point. Let's take density for instance. If we take a volume in some quantity of matter and keep on shrinking it to a point where we can assign a uniform ...
4 votes
1 answer
169 views

Reference request: modern assesement of J.H. Lambert's work on the "fluidity of sand"

While reading about different aspects of Johann Heinrich Lambert's life and work, I found many interesting side remarks about Lambert's work by different authors, though it is very hard to find modern ...
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2 votes
1 answer
97 views

Who introduced the stream function?

I have found many different claimed answers to this question: Wikipedia article on the stream function claims that Lagrange introduced it in 1781. Darrigol's The Worlds of Flow says that D'Alambert ...
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1 vote
0 answers
77 views

Complex potential in E227?

I have a reason to believe that Euler introduced the complex potential in his Continuation des recherches sur la theorie du mouvement does fluides, published in 1757. However, I am having hard time ...
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2 votes
1 answer
107 views

Who introduced velocity potential?

Wikipedia cites John Anderson’s A History of Aerodynamics and says that velocity potential was introduced by Lagrange in 1788. However, I could trace it at least to Euler 1752, where he published his ...
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3 votes
1 answer
301 views

Who introduced gravitational potential?

Some sources say that gravitational potential was introduced by Lagrange in 1773, and others say that it was introduced by Bernoulli in 1738. I sifted through Daniel Bernoulli's Hydrodynamica (...
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1 vote
0 answers
100 views

Who first defined pressure?

Before learning any topic, I always find the reason of "Why definitions are created for that particular topic?" In fluid statistics, I encountered a term called "pressure". But I ...
3 votes
1 answer
792 views

Was Rayleigh the first to derive the drag equation?

I was reading about The Drag Equation: $$ F_D = \frac{1}{2} \rho v^2 C_D A $$ where: $ F_D $ is the drag force $ \rho $ is the mass density of the fluid $ v $ is the flow velocity relative to the ...
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8 votes
0 answers
274 views

What exactly was Lagrange's "grave mistake" with respect to rotating bodies under hydrostatic equilibrium?

A comment below What would be different about satellite orbits if Earth were prolate? Would we have Sun-synchronous and Molniya orbits? got me reading Wikipedia's Jacobi ellipsoid which begins: ...
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5 votes
1 answer
177 views

Who was the first person to describe turbulence in mathematical terms?

Here I found that: Sixty years later, Russian mathematician Andrey Kolmogorov furthered our mathematical understanding of turbulence when he proposed that energy in a turbulent fluid at length $R$ ...
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3 votes
1 answer
203 views

What were Gauss's contributions to capillarity?

I am writing a Wikipedia article (in a certain language) in which I intend to include a summary of Carl Friedrich Gauss's contributions to capillarity. I know that Gauss derived the Young-Laplace ...
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