Numerical study of the enhancement produced in absorption processes using surfactants.
Numerical study of the enhancement produced in absorption processes using surfactants.
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DOI：
10.1016/j.ijheatmasstransfer.2004.01.012
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发表时间：
2004-07
影响因子：
5.2
通讯作者：
J. Castro;L. Leal;C. Pérez-Segarra;P. Pozo
中科院分区：
文献类型：
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作者：
J. Castro;L. Leal;C. Pérez-Segarra;P. Pozo
采用考虑Navier-Stokes方程的模型，研究了表面活性剂对吸收机传热传质的影响。表面活性剂是一种由于Marangoni效应而改善吸收机传热传质的物质。对于求解自由表面位置的表面跟踪方法，和表面张力的计算，采用连续表面力模型。耦合方程求解使用SIMPLEC程序。对溴化锂水溶液中两种常用的表面活性剂正辛醇和2-乙基-1-己醇进行了数值模拟，并将其在停滞池中的吸收增强作用与其他研究者的结果进行了比较。对于降膜吸收，还显示了其它一些结果。
A model that considers the Navier–Stokes equations is used to study the influence of surfactants, substances that improve heat and mass transfer in absorption machines due to Marangoni effect. For solving the free surface location a surface tracking method is used, and for the calculation of surface tension forces, a continuum surface forces model is employed. The coupled equations are solved using the SIMPLEC procedure. Two common surfactants for LiBr aqueous solutions, 1-octanol and 2-ethyl-1-hexanol, are numerically tested and the absorption enhancement produced in a stagnant pool is compared with other researchers' results. For falling film absorption some other results are showed.