Comparison of the Generalized Species Transfer Model with a Two‐Field Approach for Interfacial Mass Transfer,Chemical Engineering & Technology

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Comparison of the Generalized Species Transfer Model with a Two‐Field Approach for Interfacial Mass Transfer
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-10-09 , DOI: 10.1002/ceat.202000259
Tobias Losher ₁ , Thomas Kleiner ₁ , Simon Hill ₁ , Nadin Sarajlic ₁ , Sebastian Rehfeldt ₁ , Harald Klein ₁

Affiliation

Two different approaches can be applied to calculate the mass transfer in a two‐phase system using computational fluid dynamics and the volume‐of‐fluid method, single‐field and two‐field approaches. The used method affects the stability of the calculation as well as the accuracy of the result. Two volume‐of‐fluid‐based approaches, namely, the generalized continuous species transfer model, a single‐field approach, and a two‐field approach are compared. The models are implemented in the OpenFOAM® framework and validated in a 1D test case. Although both approaches show great agreement with the analytical solution for large time steps, numerical instabilities of the two‐field model are revealed with a reduced time step size, which leads to false results.

中文翻译：

广义物质转移模型与两场方法进行界面传质的比较

可以使用两种不同的方法，使用计算流体动力学和流体体积方法（单场和两场方法）来计算两相系统中的传质。所使用的方法会影响计算的稳定性以及结果的准确性。比较了两种基于流体体积的方法，即广义连续物种转移模型，单场方法和两场方法。这些模型在OpenFOAM®框架中实现，并在一维测试案例中进行了验证。尽管两种方法都显示出与较大时间步长的解析解非常吻合，但是通过减小时间步长揭示了两场模型的数值不稳定性，这导致了错误的结果。

更新日期：2020-11-19

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