COMSOL Multiphysics model for continuous flow microwave heating of liquids

Salvi, D.; Boldor, D.; Aita, G.M.; Sabliov, C.M.

COMSOL Multiphysics model for continuous flow microwave heating of liquids

2011

Salvi, D. | Boldor, D. | Aita, G.M. | Sabliov, C.M.

A numerical model was developed to simulate temperature profiles in Newtonian as well as non-Newtonian fluids during continuous flow microwave heating by iterative coupling of electromagnetism, fluid flow and heat transport in COMSOL Multiphysics. The model was validated by using extensive experimental data for carboxymethyl cellulose solution and tap water flowing at two different flow rates (1 and 2l/m) through a 915MHz continuous flow microwave system at 4kW of power. The electromagnetic power generation (18–20% error) and average numerical temperature were in fairly good agreement with the average experimental temperatures for carboxymethyl cellulose (R²=0.89 at 1l/m and R²=0.91 at 2l/m) and tap water (R²=0.90 at 1l/m and R²=0.81 at 2l/m).

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