Influence of various mesh types on cavitation phenomena in the injection nozzle

The evaporation of diesel fuel in the injection nozzle influences the injection characteristics and spray formation process significantly. In the presented paper the influence of various type of mesh on the cavitation phenomena is analysed. Since CPU (central processing unit) times are often high, partial models are used for the analysis. The numerical analysis is made for two types of fluid, diesel (D2) and biodiesel (B100), using computation fluid dynamic (CFD) program FIRE. The results are compared for various meshes and both types of fuel. The results show that higher pressure differences yield more cavitation in the injector nozzle holes and point out the importance of the structure of the mesh and its density