A new multi-field coupled dynamic analysis method for fracturing pipes

In petrochemical, marine, and other fields, high-concentration solid-liquid two-phase flow induced pipe vibration has always been a problem worthy of attention. Especially when the oil transports flow, researchers have introduced equivalent density into fluid momentum equation to consider influence on pipes with vibrations. This method ignores particle collision accumulation in vibration, which makes it impossible fully predict dynamic state pipes. Therefore, this paper presents fluid-particle-pipe multi-field coupling analysis (CFD-DEM-FEM method) for first time analyze by flow. The found that velocity sand ratio increase, at same diameter decreases, more significant particles location where changes, as well amplitude are all getting bigger. addition, high can produce high-amplitude high-frequency vibrations, while low-amplitude For frequency values, relative errors between current computational results those from experiments less than 15%, indicating our calculation be used Our research guide structural design process pipe, reduce chance flow-induced damage. • is proposed time. An experimental device was established. sand-carrying fracturing studied. effect analyzed.