Paper presented at the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July, 2007.
In this paper the numerical modeling of the dynamic
behavior of compressible gas flow is investigated in pipelines.
The numerical simulation is performed by solving the coupled
conservation form of the governing equations for twodimensional,
laminar, viscous, supersonic flow in developing
region under different thermal boundary conditions. The
numerical procedure is a finite-volume based finite-element
method applied on unstructured grids. The convection terms are
discretized by well-defined Roe Method and diffusion terms by
a Galerkin finite element formulation. The temporal terms are
evaluated based on an explicit fourth order Runge-Kutta
The results indicate that heating the gas flow leads to an
increase in pressure loss. In the other words, cooling the gas
flow leads to decrease the pressure drop or power consumption
of booster pressure station. Furthermore, change in the gas
viscosity has considerable effects on the flow quantities such as
pressure loss and friction factor.