A three dimensional thermal-hydraulic model is developed for the analysis of fluid flow and heat transfer in shell-and-tube heat exchanger.
提出了一种管壳式换热器壳程单相流动和传热的三维模拟方法。
Flow back of fracturing fluid is currently focus on qualitative analysis, there are few quantitative calculations.
而目前压裂液返排的研究主要集中在定性分析上，很少有定量的计算。
The paper presents the methods of estimation of sludge specific activities, determination and calculation of fluid flow pattern in digester and analysis of material balance in fermentation.
讨论了污泥比活性测试、液体流态分布测定计算及物料平衡分析等研究厌氧工艺的方法。
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