Liquid Jet Plate Imping Numerical Simulation

Jet fluid imping onto plate is typical flow which is widely applied in basic scientific research and industrial manufacturing.The single inlet jet imping onto plate is the most basic flow in imping jet onto plate.In the research of imping jet,the experiment can be replaced by numerical simulation which is more and more popular in jet fluid research domain.Furthermore,multi-phase flow needs much more computational resource than single-phase flow.Therefore,this paper develops a quasi-three dimensional numerical simulation method,and basing in this method,the liquid imping jet onto plate flow in 11 initial conditions are researched.Firstly,this paper constructs geometric model and grid independence verification according experiment results for constructing a three-dimensional method which is suitable for jet imping onto plate.On the basis of three-dimensional method,a quasi-three dimensional numerical simulation method proposed in this paper is as following: Firstly,a three-dimensional numerical simulation of the free jet closed the zone of the impact point are performed.Then based on the results of the flow field around the impact point,the computational zone should be separated into 7 two-dimensional planes.Then,in each divided two-dimensional plane,the simulation needs to be calculated by the initial condition from the results of three-dimensional calculation which is around the impact point.In this paper,the simulation results of the above methods are compared with the experimental results to verify the accurateness of the simulation method.The effects of wall roughness,jet angle,jet velocity,fluid viscosity and surface tension on the calculation results are analyzed by using the quasi-three dimensional numerical simulation method proposed in this paper.Among them,the increase of the angle of incidence will cause the distribution profile of the liquid phase on the plane to move toward the entrance and widen the stable area of the surface wave.Increasing the incident velocity can increase the area of the distribution profile of the liquid phase on the plate and make more severe wave oscillations.Increasing the fluid viscosity will lead to the decreasing of the contour surface of the liquid phase,the thickening of the liquid accumulation area and the reduction of the instability of the liquid surface.Increasing of the surface tension of the fluid will not cause changes in the flow distribution in the same direction,however,it will cause the surface wave length to increase and reduce the area of the liquid phase contour.In the comparative analysis,this paper finds that: under the same incident conditions,increasing in wall roughness can increase the height of the liquid deposition zone,the increase in near-wall surface flux distribution can increase the direction of liquid The distance traveled by the phases.Therefore,in this paper,polynomial fitting and logarithmic fitting are performed for wall roughness and liquid accumulation height,flux distribution and liquid traveling distance which can be conclude by: the liquid accumulation height increases with wall roughness,and the liquid traveling distance increases with flux distribution.