Simulation of Homogeneous Particle Nucleation in a Free Turbulent Jet |
| |
| Authors: | Kun Zhou Tat Leung Chan |
| |
| Affiliation: | Department of Mechanical Engineering , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong |
| |
| Abstract: | The homogeneous particle nucleation in a free turbulent jet is simulated at Reynolds numbers of 3400 and 34,000 by using large eddy simulation (LES) coupled with our newly developed equivalent mean nucleation method (EMNM) for the present study. The simulated velocity field, passive scalar concentration, and nucleated particle concentration are compared with various available measurements in the literature. Both the simulated mean velocity and mean scalar concentration show self-similarity properties and agree well with the experimental measurements quantitatively in the literature. Using the EMNM, it is found that the nucleation primarily occurs in a very narrow region around the jet centerline. It is also found that the position of maximum nucleation is a function of the vapor temperature and concentration at the jet exit and its surrounding background (i.e., T 0, T ∞, c 0, and c ∞), and the function varies monotonically with respect to these four parameters. Present numerical simulation and analysis also show that the group,   | |
| Keywords: | |
|
|
