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?

<P0-S0>  Separately, his studies of heat transfer between solids and fluids brought improvements in boiler and condenser design. <P0-S1> Osborne Reynolds FRS ( ; 23 August 1842 – 21 February 1912) was a prominent innovator in the understanding of fluid dynamics. <P0-S2>  He spent his entire career at what is now called University of Manchester. <SEP> <P1-S0> Mohammad Yousuff Hussaini is an Indian born American applied mathematician. <P1-S1>  He is the Sir James Lighthill Professor of Mathematics and Computational Science & Engineering at the Florida State University, United States. <P1-S2>  Hussaini is also the holder of the TMC Eminent Scholar Chair in High Performance Computing at FSU. <P1-S3>  He is widely known for his research in scientific computation, particularly in the field of computational fluid dynamics (CFD) and Control and optimization. <P1-S4>  Hussaini co-authored the popular book "Spectral Methods in Fluid Dynamics" with Claudio Canuto, Alfio Quarteroni, and Thomas Zang. <P1-S5>  He is the editor-in-chief of the journal "Theoretical and Computational Fluid Dynamics." <SEP> <P2-S0> Geophysical fluid dynamics is the study of naturally occurring, large-scale flows on Earth and other planets. <P2-S1>  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. <P2-S2>  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). <P2-S3>  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. <P2-S4>  Flows of smaller scale that are relatively unaffected by Earth's rotation or latitude or substantial layering are not part of GFD. <SEP> <P3-S0>  In 1904 at age 16, Chapman entered the University of Manchester. <P3-S1>  He competed for a scholarship to the university offered by his home county, and was the last student selected. <P3-S2>  Chapman later reflected, "I sometimes wonder what would have happened if I'd hit one place lower." <P3-S3>  He initially studied engineering in the department headed by Osborne Reynolds. <P3-S4> 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. <P3-S5>  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. <P3-S6>  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. <P3-S7>  Following Lamb's suggestion, Chapman applied for a scholarship to Trinity College, Cambridge. <P3-S8>  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. <P3-S9>  He graduated as a wrangler in 1910. <P3-S10>  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.