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中文摘要：
引言 管内气液两相弹状流是管道输运工程中常见的流型，在多相混输过程中，管内金属基体表面的腐蚀破坏受近壁面区流动特性的强烈影响，尤其是两相流动在近壁面区的切应力等特性。在目前国内外大多数关于气液两相弹状流的文献中，均以垂直上升及下降管为研究对象。这是因为垂直管内的弹状流，截面上的流动参数分布可近似为轴对称，而对于倾斜管内的流动，由于浮力和重力的影响，
英文摘要：
Based on the VOF model,CFD simulations were carried out for wall shear stress in gas-liquid vertical and inclined upward slug flow.The simulation results showed that the thickness of the falling film in the vertical upward slug flow was always smaller than that in the inclined upward slug flow.In the vertical tubes,wall shear stress increased gradually from Taylor bubble nose to the falling liquid film until it became stable in the developed falling liquid film,but in the wake zone the wall shear stress appeared irregular.In the inclined tubes,the tip of the Taylor bubble nose was above the centerline of the tube and the smaller the angle,the greater the thickness of the falling liquid film.Meanwhile,for the wall shear stress of slug flow in an inclined tube,when FrTB was small,the shear stress profile of falling liquid film on the top wall fluctuated significantly,but it was smooth on the bottom wall.With increasing FrTB, the difference between the shear stress profile on the top wall and the shear stress profile on the bottom wall gradually disappeared.
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