Fluid mechanics is a branch of physics concerned with the mechanics of fluids (liquids, gases, and plasmas) and the forces on them.
 Fluid mechanics has a wide range of applications, including mechanical engineering, civil engineering, chemical engineering, biomedical engineering, geophysics, astrophysics, and biology.
 Fluid mechanics can be divided into fluid statics, the study of fluids at rest; and fluid dynamics, the study of the effect of forces on fluid motion.
 It is a branch of continuum mechanics, a subject which models matter without using the information that it is made out of atoms; that is, it models matter from a "macroscopic" viewpoint rather than from "microscopic".
 Fluid mechanics, especially fluid dynamics, is an active field of research with many problems that are partly or wholly unsolved.
 Fluid mechanics can be mathematically complex, and can best be solved by numerical methods, typically using computers.
 A modern discipline, called computational fluid dynamics (CFD), is devoted to this approach to solving fluid mechanics problems.
 Particle image velocimetry, an experimental method for visualizing and analyzing fluid flow, also takes advantage of the highly visual nature of fluid flow.
The Fluid Dynamics Prize is a prize that has been awarded annually by the American Physical Society (APS) since 1979.
 The recipient is chosen for ""outstanding achievement in fluid dynamics research"".
 As of 2007 the prize is valued at $10,000.
 In 2004, the Otto Laporte Award—another APS award on fluid dynamics—was merged into the Fluid Dynamics Prize.
Bio-Fluid Dynamics, may be considered as the discipline of biological engineering or biomedical engineering in which the fundamental principles of fluid dynamics are used to explain the mechanisms of biological flows and their interrelationships with physiological processes, in health and in diseases/disorder.
 It can be considered as the conjuncture of mechanical engineering and biological engineering.
 It spans from cells to organs, covering diverse aspects of functionality of systemic physiology, including cardiovascular, respiratory, reproductive, urinary, musculoskeletal and neurological systems etc.
 Bio fluid dynamics and its simulations through computational fluid dynamics (CFD) apply to both internal as well as external flows.
 Internal flows such as cardiovascular blood flow and respiratory airflow, and external flows such as flying and aquatic locomotion (i.e., swimming).
 Biological fluid Dynamics (or Bio fluid Dynamics) involves the study of the motion of biological fluids (e.g. blood flow in arteries, animal flight, fish swimming, etc.).
 It can be either circulatory system or respiratory systems.
 Understanding the circulatory system is one of the major areas of research .
 The respiratory system is very closely linked to the circulatory system and is very complex to study and understand.
 The study of Bio fluid Dynamics is also directed towards finding solutions to some of the human body related diseases and disorders.
 The usefulness of the subject can also be understood by seeing the use of Bio fluid Dynamics in the areas of physiology in order to explain how living things work and about their motions, in developing an understanding of the origins and development of various diseases related to human body and diagnosing them, in finding the cure for the diseases related to cardiovascular and pulmonary systems.
The Otto Laporte Award (1972–2003) was an annual award by the American Physical Society (APS) to ""recognize outstanding contributions to fluid dynamics"" and to honour Otto Laporte (1902–1971).
 It was established as the Otto Laporte Memorial Lectureship by the APS Division of Fluid Dynamics in 1972, and became an APS award in 1985.
 The Otto Laporte Award was merged into the Fluid Dynamics Prize in 2004, in order to obtain one major prize in fluid dynamics by the APS.
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.
 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 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.
Thomas S. Lundgren is an American fluid dynamicist and Professor Emeritus of Aerospace Engineering and Mechanics at the University of Minnesota He is known for his work in the field of theoretical fluid dynamics.
 In 2006, Lundgren received Fluid Dynamics Prize by the American Physical Society "for his insightful theoretical contributions to numerous areas of fluid mechanics, most notably in the fields of turbulence and vortex dynamics"
Astrophysical fluid dynamics is a modern branch of astronomy involving fluid mechanics which deals with the motion of fluids, like the gases which the stars are made up of or any fluid which is found in outer space.
 The subject covers the fundamentals of mechanics of fluids using various equations, ranging from continuity equation, Naiver Stokes to Euler's equations of collisional fluids and the like.
 It is an extensive study of the physical realms of the astral bodies and their movements in space.
 A thorough understanding of this subject requires detailed knowledge of the equations governing fluid mechanics.
 Most of the applications of astrophysical fluid dynamics include dynamics of stellar systems, accretion disks, Astrophysical jets, Newtonian fluids, and the fluid dynamics of galaxies.
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.
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.
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."

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?
Answer: 16