改进浮羽流区计算的溶腔扩展数值模拟

Numerical Simulation of Cavity Development Based on Improved Calculation of Plume Region

为了提高岩盐水溶开采中溶腔扩展数值模拟的准确性,提出了考虑浮羽流区影响的盐壁处与溶腔主体区浓度差的计算方法.采用有限分析法(FAM)求解浮羽流区域的湍流模型,在此基础上计算浮羽流区和与其相邻的溶腔主体区的溶质扩散和对流输运,进而建立溶腔主体区浓度计算模型.算例表明,用此方法获得的溶腔扩展的数值模拟结果与试验数据吻合.

To enhance the numerical simulation accuracy of cavity development in solution mining of rock salt, a calculational method for the concentration difference between the salt and the main region of cavity was proposed by considering plume effects. The finite analytic method （FAM） was used to solve the turbulence model for a plume region, and then solute diffusion and convection in the plume region and its neighboring main region were calculated. Based on the above, a model for concentration of salt in the main region was set up. A calculational example shows that the numerical simulation result of cavity development obtained with this method accords with the experimental result.