Manson, K2015-12-132015-12-13November 19703211585http://hdl.handle.net/1885/78991I have investigated the effects of including a more realistic cooling law in SPH simulations of accretion discs. In order to improve the efficiency of the simulations, I have used Strang operator splitting, and I have developed a method of timestep control which guarantees the accuracy and stability of the simulations.20042015-12-11