Below are two COMSOL simulations for a laminar flow reactor with heat effects: Run 1 and R...

Below are two COMSOL simulations for a laminar flow reactor with heat effects: Run 1 and Run 2. The figures below show the cross-section plot of concentration for species A at the middle of the reactor. Run 2 shows a minimum on the cross-section plot. This minimum could be the result of (circle all that apply and explain your reasoning for each suggestion (a) through (e))

(a) the thermal conductivity of reaction mixture decreases

(b) overall heat transfer coefficient increases

(c) overall heat transfer coefficient decreases

(d) the coolant flow rate increases

(e) the coolant flow rate decreases

Hint: Explore “Nonisothermal Reactor II” on the COMSOL CD-ROM.

COMSOL screen shots