A device or substance that causes something to become fluidized, or that maintains a fluidized state.
From 'fluidize' plus '-er' (agent noun, one who or that which does something). Created in technical engineering language in the 20th century.
In coffee roasting, the fluidizer is often just compressed air blowing upward, but it's crucial—the speed has to be just right or the beans won't fluidize properly. Engineers have to calculate the 'minimum fluidization velocity' for each material.
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