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- W2371992842 abstract "This paper is aimed at disclosing what kind of momentum plays the dominant role in particle reentrainment,how the momentum changes with the diameter of particle aggregate as well as how the diameter of aggregate influences the particle reentrainment,because these are two important phenomena in controlling the particles of the diesel engine' s exhaust.In proceeding with our research,we have first of all chosen the model of a momentum balance as particle reentrainment model.In this model,the momentum of the forces determines the mobile state of the particles.We have also worked out the momentum of forces,i.e.,the particle adhesion,gravity,aerosol collision and aerodynamic drag,which are acting on the diesel engines deposited aggregate on the basis of the momentum balance.The analytical solutions we have gained indicate that the momentum regularly changes with the aggregate diameter,and the scale of each momentum, as well as the role each momentum plays in the particle reentrainment.The general tendency is that all the momentums of the forces tend to become bigger with the increase of the particle diameter. Of all the influential factors,the momentum of adhesion,the collision and the aerodynamic drags play the main roles in keeping the balance of the deposited particles.Assuming that when the particle diameter is 0.1 μm,the aggregate of size 0.1 - 0.8 μm in diameter and the momentum of adhesion has effect on the deposited particle stabilization,for the increase of its movement tends to promote the increase of the aggregate diameter than the collision of an aerosol particle and the drag of aerosol flow.And,now,with the increase of the particle diameter,the collision of an aerosol particle and the drag of the aerosol flow tend to increase faster than the momentum of adhesion, which plays an important role in the reentrainment.However,if the aggregate is smaller,the drag of aerosol flow would have a larger proportion in the total momentum,which in turn actuates the particle reentrainment.On the contrary,the collision of aerosol particles now plays the main role.Therefore,when the momentum balance broke up,the motion state would like to change with the momentum of forces,the aggregate would now slip,roll or come into rentrainment." @default.
- W2371992842 created "2016-06-24" @default.
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- W2371992842 date "2011-01-01" @default.
- W2371992842 modified "2023-09-27" @default.
- W2371992842 title "Moment analysis of deposited aggregate based on particle rentrainment" @default.
- W2371992842 hasPublicationYear "2011" @default.
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