Abstract A semi-empirical model was proposed to estimate the apparent viscosity of gas-fluidized suspensions. This new model was derived by assuming that a suspension consisted of the bubble phase and the emulsion phase. A set of experimental measurements were also conducted to verify the validity of the proposed model as well as the models in the literature. The results indicated that none of the tested literature models provided satisfactory predictions for the fluidized gas-solid suspension over the mentioned target particle volume fraction range. The estimation using the newly proposed model generally well agreed with the experimental apparent viscosity values of the gas-solid suspensions composed of gas-fluidized Geldart Group A or B particles, as most of the estimated values situated within the ±25% error bars. The proposed model is of special significance as it provides a quick estimation method of the apparent viscosity of a gas-solid suspension flow in the engineering calculation.

中文翻译：

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一种估计稠密鼓泡气固悬浮液表观粘度的半经验模型

摘要 提出了一种估计气体流化悬浮液表观粘度的半经验模型。这个新模型是通过假设悬浮液由气泡相和乳液相组成而推导出来的。还进行了一组实验测量以验证所提出的模型以及文献中模型的有效性。结果表明，所测试的文献模型均未对上述目标颗粒体积分数范围内的流化气固悬浮液提供令人满意的预测。使用新提出的模型进行的估计通常与由气体流化 Geldart A 组或 B 组颗粒组成的气固悬浮液的实验表观粘度值一致，因为大多数估计值位于 ±25% 误差条内。