Armand de Waele

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Armand Michel A. de Waele (17 November 1887 – December 1966) was a British chemist famous for his work on how liquids flow. The Ostwald–de Waele relationship for non-Newtonian fluids is named after him.

He was born in Islington, London, to a Belgian father and a French mother, and held dual nationality until he was 21, when he chose to be British. He earned a BSc from Regent Street Polytechnic and then worked in the paint and linoleum industries.

In 1914 he was conscripted into the Royal Flying Corps and married Jeanne Thérèse Duvivier; they had two sons, John and Peter. After World War I, he became Chief Research Chemist at Gestetner, a position he held until his retirement in 1957. During this time he published about 30 rheology papers, held patents on duplicating technology, and wrote a book.

He was a Fellow of the Royal Institute of Chemistry and of the Institute of Physics. He died in Enfield in December 1966.