Investigation On Numerical Simulation Of Two-phase Vertical Jet Based On DES Model

The sand blasting process has been widely used in the petroleum and petrochemical industry as a commonly used off-line cleaning process.This study is mainly aimed at the pollution problem caused by the dust generated by solid particles in high-speed turbulent enthalpy in the sand blasting process,which used the numerical simulation method to analyze the distribution of fine dust particles during flow.And it provides theoretical support for the reduction of dust formation and treatment of dust pollution.In this study,the Detached-Eddy Simulation(DES)was used to simulate the flow field of a single-phase vertical jet with a low Reynolds number(Re=23000)in the case of two nozzle-wall spacings(x/D=2 and 6),and the flow field of a single-phase vertical jet with a high Reynolds number at low nozzle-wall spacing(x/D = 2 and Re= 70000).Then it is found that the distribution of the normal stress versus the local maximum velocity curve has a similar law by observing the flow field data under three different conditions.After that,the gas-solid two-phase simulation was carried out by adding the particle phase to the single-phase vertical jet flow field,and the simulation results of the two-phase vertical jet were analyzed.This study highlighted the distribution of particle motion under five particle sizes and two Reynolds numbers,and summarized the variation law of particle motion caused by particle size change.All the results of the study lay the theoretical foundation for continuing research to convert numerical simulation results into the application of the sandblasting dust protection.