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Numerical Simulation of Effect of Wall Roughness on the On-way Resistance Based on FLUENT
Author(s): 
Pages: 101-106+110
Year: Issue:  6
Journal: Wuhan Shipbuilding

Keyword:  oil pipelineroughnesson-way resistanceFLUENTnumerical simulation;
Abstract: Aiming at the problem of obtaining accurately the on-way resistance of submarine pipeline at the design stage,numerical simulation method is adopted to analyze the relationship between loss of viscous fluid friction and wall roughness of the pipeline based on FLUENT. Comparing the calculated results with theoretical results and the actual situations,the results show there is a good agreement,except for the flow pattern transiting from the hydraulic smooth region to the mixed friction region. It is confirmed that the friction coefficient is strongly influenced by pipeline wall roughness only in the turbulent mixing friction region. In this case,reducing the surface roughness of the wall can cut down the resistance. If the flow pattern transits from the hydraulic smooth region to the mixed friction region,it is inappropriate to calculate friction coefficient only by the empirical formulas,and numerical simulation is the method that should be considered.
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