Question: At what age did the mathematician, who studied engineering in the department headed by a prominent innovator in the understanding of fluid dynamics, enter the University of Manchester in 1904?

 In 1904 at age 16, Chapman entered the University of Manchester.  He competed for a scholarship to the university offered by his home county, and was the last student selected.  Chapman later reflected, "I sometimes wonder what would have happened if I'd hit one place lower."  He initially studied engineering in the department headed by Osborne Reynolds. Chapman was born in Eccles, near Salford in England and began his advanced studies at a technical institute, now the University of Salford, in 1902.  Chapman was taught mathematics by Horace Lamb, the Beyer professor of mathematics, and J. E. Littlewood, who came from Cambridge in Chapman's final year at Manchester.  Although he graduated with an engineering degree, Chapman had become so enthusiastic for mathematics that he stayed for one further year to take a mathematics degree.  Following Lamb's suggestion, Chapman applied for a scholarship to Trinity College, Cambridge.  He was at first awarded only a partial scholarship as a sizar (meaning that he obtained financial support by acting as a servant to other students), but from his second year onwards he received a full scholarship.  He graduated as a wrangler in 1910.  He began his research in pure mathematics under G. H. Hardy, but later that year was asked by Sir Frank Dyson to be his chief assistant at the Royal Greenwich Observatory. <SEP> Geophysical fluid dynamics is the study of naturally occurring, large-scale flows on Earth and other planets.  It is applied to the motion of fluids in the ocean and outer core, and to gases in the atmosphere of Earth and other planets.  Two features that are common to many of the phenomena studied in geophysical fluid dynamics are rotation of the fluid due to the planetary rotation and stratification (layering).  The applications of geophysical fluid dynamics do not generally include the circulation of the mantle, which is the subject of geodynamics, or fluid phenomena in the magnetosphere.  Flows of smaller scale that are relatively unaffected by Earth's rotation or latitude or substantial layering are not part of GFD. <SEP> Osborne Reynolds FRS ( ; 23 August 1842 – 21 February 1912) was a prominent innovator in the understanding of fluid dynamics.  Separately, his studies of heat transfer between solids and fluids brought improvements in boiler and condenser design.  He spent his entire career at what is now called University of Manchester. <SEP> Mohammad Yousuff Hussaini is an Indian born American applied mathematician.  He is the Sir James Lighthill Professor of Mathematics and Computational Science & Engineering at the Florida State University, United States.  Hussaini is also the holder of the TMC Eminent Scholar Chair in High Performance Computing at FSU.  He is widely known for his research in scientific computation, particularly in the field of computational fluid dynamics (CFD) and Control and optimization.  Hussaini co-authored the popular book "Spectral Methods in Fluid Dynamics" with Claudio Canuto, Alfio Quarteroni, and Thomas Zang.  He is the editor-in-chief of the journal "Theoretical and Computational Fluid Dynamics."