Mathematical and physical modeling of thermal stratification phenomena in steel ladles

International Conference on Applied Sciences 2017

Putan, V.^1 ; Vilceanu, L.^1 ; Socalici, A.^1 ; Putan, A.^1

Politehnica University of Timisoara, Engineering and Management Department, 5 Revolution Street, Hunedoara

331128, Romania^1

关键词: CFD numerical modeling;    Convection phenomena;    Dimensionless number;    Fluid flow and heat transfers;    Measured temperatures;    Similarity criteria;    Systematic analysis;    Temperature profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/294/1/012004/pdf
DOI  :  10.1088/1757-899X/294/1/012004

来源: IOP

【 摘 要 】

By means of CFD numerical modeling, a systematic analysis of the similarity between steel ladles and hot-water model regarding natural convection phenomena was studied. The key similarity criteria we found to be dependent on the dimensionless numbers Fr and βΔT. These similarity criteria suggested that hot-water models with scale in the range between 1/5 and 1/3 and using hot water with temperature of 45 °C or higher are appropriate for simulating natural convection in steel ladles. With this physical model, thermal stratification phenomena due to natural convection in steel ladles were investigated. By controlling the cooling intensity of water model to correspond to the heat loss rate of steel ladles, which is governed by Fr and βΔT, the temperature profiles measured in the water bath of the model were to deduce the extent of thermal stratification in liquid steel bath in the ladles. Comparisons between mathematically simulated temperature profiles in the prototype steel ladles and those physically simulated by scaling-up the measured temperatures profiles in the water model showed good agreement. This proved that it is feasible to use a 1/5 scale water model with 45 °C hot water to simulate natural convection in steel ladles. Therefore, besides mathematical CFD models, the physical hot-water model provided an additional means of studying fluid flow and heat transfer in steel ladles.