| Summary: | 碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 103 === In this study, a numerical model is built to investigate the factors on carbon dissolution rate and develop a lump system for carbon particle dissolution in hot liquid metal. We assume the carbon particles dissolve in the molten iron is a quasi-steady process. Therefore, the steady state model has been developed.
The simulation data shows the distribution of mass dissolution rate at the particle surface is significantly affected by the flow circulation behind a particle as a relative flow velocity is applied. The lump system has been developed by the correlation of Reynolds number and Schmidt number, which can predict the carbon particles dissolve at times of different state. The correlation of mass/heat transfer are as following:
Sh=2.81+0.52 Re^0.52 Sc^0.38
Nu=0.53+0.27 〖Re〗^034 Pr^0.16
The study also established a transient model, and compare the time of dissolution between two models. Simulation results of transient model show that when the Reynolds number is smaller, the dissolution rate of carbon particles goes to be slightly longer.in addition this study also building a two dimension injection model through the simulation result of different model confirm the reliability of lump system
|
|---|
