Is there any way of calculating of surface area in aggregative or bubbling fluidized bed?

Answer 1

Hi Lilli,

I did some research. But I'm not going to spend a lot of time digging into the details. I will let you read the article I found. Here is the equation of he surface area of particles in fluidized beds (warning: it's pretty obvious):

As = (pi) dp^2

where

As = Surface area
pi = 3.14
dp = particle diameter

If you do not know he particle diameter you may be able to back calculate if know the sphercity and void fraction. Detail calculations are provided in the link provided.

Answer 2

Hi. I think you can only estimate it. Each bubble would have a surface area depending on its size so, assuming a uniform diameter, the area would relate to the number of bubbles within the confines of your bed. Same principle for an aggregate.