Numerical Analysis Of Horizontal Cylinder Tank Sloshing Based On GPU Accelerated MPS Method

In a container partially filled with liquid,sloshing will occur once disturbance occurs.For many working conditions,serious sloshing may lead to disaster.Therefore,studying the characteristics of sloshing and predicting the impact load of sloshing are extremely important issues in practical engineering.Horizontal cylindrical tanks are widely used in various engineering fields,including ships,aerospace,land transportation,chemical industry and so on.It has important practical significance for the study of sloshing characteristics in cylindrical tanks.Based on the in-house meshless particle solver MPSGPU-SJTU,this paper analyzes the sloshing characteristics of horizontal cylindrical tanks from the aspects of excitation frequency,liquid carrying rate,amplitude and three-dimensional effect,and compares the horizontal cylindrical tanks with the horizontal square-section tanks.The main work of this paper is as follows:1.Solver validationReferring to the experiment,numerical models with different particle spacing are established to verify the convergence of particle arrangement.Compared with the experimental results,the reliability of the calculation results is verified,and the appropriate particle spacing is selected.Compared with the calculation results of CPU version solver,the acceleration effect of GPU technology is illustrated.The simulation is carried out on different GPU devices and the calculation results are compared.The results show that the solver is generally applicable on different GPU devices.2.Analysis of sloshing characteristics of horizontal cylindrical tankThere are many parameters that affect sloshing: excitation frequency,excitation amplitude,filling rate,tank shape,viscosity of liquid in tank,etc.In this paper,the influence of excitation frequency,excitation amplitude and carrier liquid ratio on sloshing phenomenon is analyzed.The results show that there will be a strong slamming phenomenon near the natural frequency,and the sloshing will weaken when it is far away from the natural frequency.With the increase of the filling rate,the nonlinear phenomenon in the tank is more likely to occur.The intensity of sloshing and wall pressure are positively correlated with the excitation amplitude.Previous numerical studies on sloshing of horizontal tanks were mostly based on two-dimensional models,but in actual engineering,complete two-dimensional does not exist.In our simulation,we found that under some conditions,the transverse excitation will cause longitudinal fluid fluctuations.This paper describes and explores this phenomenon.3.Comparative analysis of sloshing between cylindrical tanks and square tanksCylindrical tank and square tank are among the most common tank forms.In the process of tank design,designers are often faced with the choice of these two tank forms.In this paper,the sloshing phenomenon under the same external excitation and the difference between pressure distribution and tank force are analyzed.The results show that the main difference between the two is reflected in sloshing phenomenon and local load.The cylindrical tank is more difficult to have wall slamming than the square tank at low liquid filling rate.It is more difficult for the cylindrical tank to have nonlinear flow than the square tank at low liquid filling rate,and the cylindrical tank can avoid strong top slamming at high filling rate.