| Popis: |
We have made a theoretical study of the diffusional losses of particles from a fluid flowing radially inward between concentric, parallel, circular plates of radius, Ro. The relative number of particles remaining in the fluid at a distance, r, from the axis of the plates is N N 0 =0·9104 e −2·8278γ +0·0153 e −32·147γ +0·0153 e −93·475γ +0·0068 e 186·805γ +… where γ = 4πD (Ro2 − r2)/3Qh, D is the diffusion coefficient of the particles, Q is the volumetric flow rate, and 2h is the separation between the plates. The practical application of the system is discussed. The same equation applies to parallel flow through a duct of rectangular cross-section if γ = 4DBl/3Qh, where B and l are respectively the duct width and length. It is more accurate than equations now in use to describe this process. |
