✍ Scribed by J.A. Asenjo; R. Muñoz; D.L. Pyle
No coin nor oath required. For personal study only.
Theory 1s developed to pre&ct the maxunmn pressure drop and superticlal gas velocity durmg the onset of spoutmg The theory, whch 1s v&d for low Reynolds number flows, assumes an approxunate form for the gas dlstnbution m the bed from tbe central mjection pomt Spoutmg IS predicted to commence when the upwards drag force exerted by the gas balances the we&t of parkles w~thm the volume enclosed by the gas flow There IS reasonable agreement between the theory and experunental results for the transihon and some experunental results for pressure dlstnbutions III smtions not covered by the theory are presented In parkular, the existence and unportauce of radial pressure gradients near the mJcction point are &cussed
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