and oxygen started to form and the molar flow rate of the products increased following the trend of
reaction rate. But, the maximum reaction rate did not exceed 0.004 g/s and the oxygen molar flow rate at
the outlet reached a maximum of 1 x 10-7mol/s. A recirculation zone has been noticed near the aperture
of the reactor inside the cylindrical cavity region due to the combined effect of axial flow and swirl flow.
This resulted in flow reversal out of the reactor cavity through the aperture into the conical wall region.
At the end of feeding phase, ZnO particles were distributed through 4 mm from the cavity wall. All the
ZnO particles were within the created inflation boundary layer mesh.
3.4 Dissociation of zinc oxide
The third phase of the simulation is the important phase of reaction wherein the cavity temperature
increases and results in an exponential increase in reaction rate. The input power is increased to a
maximum value of 7 kW and kept constant. The oxygen molar flow rate initially increases exponentially
with time, but after 4500 s due to the reduced rate of rise in temperature and concentration of particles,
the reaction rate drops and hence the oxygen molar flow rate also drops. From the Fig. 6, it can be seen
that at the end of the reaction, heat from the cavity wall diffused more through the insulation and hence
increasing the outer wall loss by convection and radiation to the ambient. At the end of dissociation, the
and oxygen started to form and the molar flow rate of the products increased following the trend of
reaction rate. But, the maximum reaction rate did not exceed 0.004 g/s and the oxygen molar flow rate at
the outlet reached a maximum of 1 x 10-7mol/s. A recirculation zone has been noticed near the aperture
of the reactor inside the cylindrical cavity region due to the combined effect of axial flow and swirl flow.
This resulted in flow reversal out of the reactor cavity through the aperture into the conical wall region.
At the end of feeding phase, ZnO particles were distributed through 4 mm from the cavity wall. All the
ZnO particles were within the created inflation boundary layer mesh.
3.4 Dissociation of zinc oxide
The third phase of the simulation is the important phase of reaction wherein the cavity temperature
increases and results in an exponential increase in reaction rate. The input power is increased to a
maximum value of 7 kW and kept constant. The oxygen molar flow rate initially increases exponentially
with time, but after 4500 s due to the reduced rate of rise in temperature and concentration of particles,
the reaction rate drops and hence the oxygen molar flow rate also drops. From the Fig. 6, it can be seen
that at the end of the reaction, heat from the cavity wall diffused more through the insulation and hence
increasing the outer wall loss by convection and radiation to the ambient. At the end of dissociation, the
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