Modeling and Analysis of Viscous Dissipation Phenomenon on Temperature Distribution in the Process of Injection Explosive Fluid

The explosive viscous liquid becomes inject to warhead by discharge system. The injection device is consisted of a piston to move down and leads the viscous fluid through the cylindrical pipe towards the end of the duct. Then the viscous fluid leads into a convergent path that will be injected to the warhead or other injection equipment. In this project, the path of viscous fluid flow is divided and thermal analysis has been done through the converging pipe as a part of discharge system. Also viscous dissipation phenomenon that is due to the viscosity of the fluid is considered. It will raise the temperature into the transmission path; Forced convection heat transfer is investigated analytically. Fully developed laminar flow is assumed. This analysis is done by considering wall heating and wall cooling. By comparison the effect of viscous dissipation and heat flux in this paper is shown that the effect of which of them is more significant. Axial heat conduction is considered negligible. The physical properties are assumed to be constant. The theoretical analysis of the steady heat transfer in nozzle flow for non-Newtonian fluid with considering viscous dissipation term in energy equation is performed by analytical method. An important feature of this approach is obtaining steady temperature distribution of explosive fluid in converging pipe flow with viscous dissipation. The effects of the inlet main velocity and density of fluid on the distribution of temperature are shown. Also effect of changing the convergence angle on heat transfer is shown.