Computational Fluid Dynamics - Basic (e)

1-D flow model in nozzles

In this section, the behavior of a variety of fluid flows in two types of nozzles (converging and de Laval) will be discussed using 1-dimensional model approximation. The compressible and incompressible models are vastly explained in many thermodynamic books and websites. Therefore, the subsections about compressible and incompressible 1-D models will be very brief. But regarding the multiphase flow, there are not so many applicable tools to model its behavior in 1-D. So the focus of this section will be more on explaining the phase change through the nozzle.

Here are the list of cases which are going to be discussed:

 (e-1) Incompressible fluid through a converging nozzle
 (e-2) Compressible fluid through a converging nozzle
 (e-3) Multiphase flow through a converging nozzle
 (e-4) Compressible fluid through a converging-diverging (de Laval) nozzle

Fig. e.1. Multiphase flow through a converging nozzle, Gas volume fraction.