A Method Of Diffusion On Textile Surface Based On SPH Model

As an indefinite form,fluid simulation is always a hot topic in computer graphics,which becomes more and more realistic and efficient along with the deep development of research.Among those researches,some of them not only simulate the fluid itself but also the interaction with other medium,for example,the mixture with fluid and gas,the collision between fluid and solid and the dissolution of fluid and other fluid.As to the simulation of the fluid-solid interaction,they always considered the collision and the splashing of the fluid and focused on the change of the fluid shape and the motion trail,but few of them took account the fluid penetration and mixture.We propose a method for simulation and visualization of the process of fluid diffusion on different kinds of porous textile and show different experimental results provided with the attributes of the textiles.In our method,we construct the model of liquid drops based on the SPH framework by using a large amount of particles with fluid attributes such as velocity and acceleration to represent the mass points of the fluid,and keeping the different mass and viscosity parameters for the mixture fluid simulation,then we perform the diffusion computation based on the Second Fick’s Law.The textile used in our experiment is a kind of woven fabric consisted by warp and weft fibers so that the void space between inter-sectional fibers forms the capillary pores for diffusion across the textile.To visualize the wetting process of liquid,we define a color bar to represent the different concentration of water in the fibers.Based on the fluid model and the porous textile model,we successfully realize the simulation of the liquid-solid collision,liquid absorption and diffusion until the liquid diffusion balance.