Buspirone pharmacokinetics in autistic children

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/110082/1/cptclpt2005123.pd

Modelling of direct injection diesel engine combustion and emissions-An easy and reliable method

1-8<span style="font-size:11.0pt;line-height: 115%;font-family:" calibri","sans-serif";mso-fareast-font-family:"times="" new="" roman";="" mso-ansi-language:en-in;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="" lang="EN-IN">odelling of combustion and emission phenomenon in diesel engines is on the cross roads. Because of the availability of super computers, highly sophisticated multi-dimensional models are being developed making global thermodynamic models obsolete. However, multi-dimensional models are quite expensive from the point of view of memory and computer time, whereas simple thermodynamic models lack accuracy. In this paper, a via media approach between the global and multi-dimensional models is attempted. The model employs a two-zone approach dividing the combustion chamber into burning and non-burning zones. The burning zone is identified by the spray characteristics and air entrainment. Formulation and solution of energy and mass conservation equations in the spray zone and the rest of the cylinder results in the determination of burning zone, non-burning zone and the average cylinder gas temperatures. This helps in the prediction of thermal efficiency and most importantly the emission characteristics.</span

Simulation of exhaust and intake processes in a four-stroke direct-injection diesel engine by control volume approach

189-194<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">A rigorous mathematical treatment for the determination of the air admission rate by the simulation of the intake and exhaust systems of a four-stroke direct-injection (DI) diesel engine solving the continuity and energy conservation equation in a control volume is presented in this paper. The treatment allows the variation of valve timing, cross-sectional area of the valves, speed of the engine and intake and exhaust manifold pressures and temperatures. The heat transfer effect from the cylinder walls to the gas and vice versa is considered. The methodology adopted for the validation of the data is by comparing the pressure-time histories during suction and exhaust and finally comparing the volumetric efficiencies between the numerical and experimental investigations. From the present study it is concluded that the scheme described in this paper is capable of handling both intake and exhaust process quite satisfactorily.</span