It was at Westcott that Stewartson became involved in studying compressible fluid flow problems, and he worked there until 1946 when he returned to Cambridge.
Ito ay sa Westcott na Stewartson naging kasangkot sa pag-aaral napipiga likido daloy ng mga problema, at siya ay nagtrabaho doon hanggang 1946 kung kailan siya bumalik sa Cambridge.