physics

William H. Matthaeus

William H. Matthaeus is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand William H. Matthaeus rather than just read about it. In short: William Henry Matthaeus (born 1951) is an American astrophysicist and plasma physicist. He is known for his research on turbulence in magnetohydrodynamics (MHD) (e.g. numerical simulations and kinetic theory) and astrophysical plasmas (e.g. solar wind and its fluctuations), for which he was awarded the 2019 James Clerk Maxwell Prize for Plasma Physics.

Key takeaways

William H. Matthaeus belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect William H. Matthaeus to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of William H. Matthaeus from memory before moving on to harder problems.

Reference excerpt

William Henry Matthaeus (born 1951) is an American astrophysicist and plasma physicist. He is known for his research on turbulence in magnetohydrodynamics (MHD) (e.g. numerical simulations and kinetic theory) and astrophysical plasmas (e.g. solar wind and its fluctuations), for which he was awarded the 2019 James Clerk Maxwell Prize for Plasma Physics.

Early life and career Matthaeus graduated from the University of Pennsylvania with a bachelor's degree in physics and philosophy in 1973 on a scholarship from the Mayor of Philadelphia. In 1975, he received an M.A. in physics at Old Dominion University in Norfolk, Virginia, and then received an M.S. in physics and Ph.D in physics at the College of William and Mary in 1977 and 1979 respectively. His thesis was on "Nonlinear Evolution of the Magnetohydrodynamic Sheet Pinch" and he was supervised by David Campbell Montgomery. Since 1983, he has been affiliated with the Bartol Research Institute and is currently Unidel Professor of Physics and Astronomy at the University of Delaware. Matthaeus is involved in the Swarthmore Spheromak experiment and since 2004 has been significantly involved in the Parker Solar Probe, launched in 2018, to study the corona of the sun. He has been director of NASA's Delaware Space Grant since 2016. In the 1990s, Matthaeus applied the Lattice Boltzmann method to magnetohydrodynamics and in 1992, published a well-cited paper showing that it was possible to recover the Navier-Stokes equation by using the Lattice Boltzmann method.

Honors and awards In 1985, Matthaeus received the James B. MacElwane Award from the American Geophysical Union and became its fellow. He was then elected a fellow of the American Physical Society in 1998. In 2019, he received the James Clerk Maxwell Prize for Plasma Physics for "pioneering research into the nature of turbulence in space and astrophysical plasmas, which has led to major advances in understanding particle transport, dissipation of turbulent energy, and magnetic reconnection". In 2024, he won the highest faculty honor at the University of Delaware — the Francis Alison Award. This award recognizes his pioneering research in space physics and his strong history as a mentor. In 2025, he was elected to the National Academy of Sciences.

References

Worked examples

Example 1 — a first encounter with William H. Matthaeus

Start with the simplest possible case. Write down what William H. Matthaeus claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to William H. Matthaeus before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about William H. Matthaeus ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of William H. Matthaeus

In research: William H. Matthaeus appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses William H. Matthaeus in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: William H. Matthaeus is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1951 births, American astrophysicists, American plasma physicists, so understanding it makes those chapters shorter.
In everyday life: Look for William H. Matthaeus outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study William H. Matthaeus in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what William H. Matthaeus means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain William H. Matthaeus out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is William H. Matthaeus in simple terms?

Why does William H. Matthaeus matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study William H. Matthaeus?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on William H. Matthaeus.