Research On Unified Fluid Simulation Based On SPH And Detail Optimization

Physical-based fluid realistic simulation is one of the challenges in computer graphics.With the continuous development of software and hardware,fluid simulation has been extensively used in entertainment industries such as film,animation,games,and etc.Meanwhile,it has been widely applied to traditional hydrodynamics and fluid engineering in such application areas as aviation,aerospace,shipping,water conservancy and so on.However,most of the fluid simulation methods are designed for a specific fluid,lacking unified methods to achieve simulation of various fluids and detail optimization.To achieve real-time simulation,control and optimization of different kinds of fluid,we propose research on unified fluid simulation based on SPH and detail optimization.Firstly,to address the lack of versatility of existing fluid simulation methods,we propose a method based on SPH(Smoothed Particle Hydrodynamics),which can simulate the motion of fluid uniformly.We transforms the fluid target into particles,which are then driven to form the desired fluid shape by the kernel function of constraining fluid density.So that the proposed method is no longer limited to a specific kind.Meanwhile,aimed at improving the overall efficiency,we propose a neighborhood particle search algorithm based on hash table,which can highly accelerate particle searching in fluid simulation.Secondly,aiming at the detail problem in fluid simulation,based on MC(Marching Cubes)for particle surface reconstruction,a compression wave(Acoustic)algorithm is proposed to optimize the details of different fluids.The process of this method are as following.1)obtaining the updated particle density through the wave equation.2)dividing the space into different ranges according to the boundary layer of the fluid to derive the external particles.3)using the updated particle density to replace the external one.Compared with other methods,this method is simpler to implement,and is capable of obtaining more realistic and natural effect.Finally,in order to further verify the effectiveness of the proposed method in practical scenarios,the corresponding prototype system is designed and implemented.The experimental results show that the proposed unified fluid simulation and detail optimization methods can simulate the motion of various fluids in real time.Therefore,the proposed method has merit to apply to practical scenes.