Numerical simulation of plate scour around offshore platforms and strategies to prevent it

With the increase in construction in the sea, protective structures are considered to prevent their instability in the marine environment. Among the coastal protective structures, submerged plates are used in marine structural engineering to prevent scour. Therefore, it is very important to study and understand the erosion and sedimentation process in the area of the offshore platform base lines in terms of design, protection and maintenance. In this research, using the computational fluid dynamics method and Fluent software, the flow around the submerged offshore platform base was simulated with different Reynolds number states. The results of the iso velocity lines, m/s, show that the speed decreases behind the offshore platform base. The maximum speed is below the offshore platform base line, which will cause scour. By increasing the Reynolds number from ۳۰۰۰ to ۷۰۰۰, the maximum speed in this state increases. The results of the iso pressure lines in Pascals show that the pressure behind the base presses and decreases above and below it. The maximum negative pressure is below the base line of the offshore platform, which will cause scouring. As the Reynolds number increases from ۳۰۰۰ to ۷۰۰۰, the negative pressure in this case increases from -۰.۰۷ to -۰.۳ in Pascal, which will cause scouring. The maximum pressure is below the base line of the offshore platform, which is significantly higher than the case without the use of plates, which reduces the risk of scouring around the base.

کلیدواژه ها:

Offshore platform baselines ، Flow patterns ، Scouring ، barrier plates ، PRESSURE GRADIENT