| frequency factor (1/s) |

| concentration of the reactant “A” in water (mol/m |

| specific heat capacity (J/(kg×K)) |

d | characteristic length (m) |

| diffusivity of the reactant “A” in water (m |

| activation energy (J/mol) |

| heat of reaction (J/mol) |

| thermal conductivity (J/(m×K×s)) |

| reaction rate constant (1/s) |

N | number of nodes for each biquadratic element |

p | pressure (N/m |

| expelled energy (J/(m |

| reaction rate (mol/(m |

Re | Reynolds number |

| gas constant (J/(mol・K)) |

| nonlinear residual equations |

t | time (s) |

| fluid temperature (K) |

| average temperature (K) |

| rods temperature (K) |

| inlet reactant fluid temperature (K) |

Re | Reynolds number |

| x and y components of dimensional velocities, respectively (m/s) |

| inlet reactant fluid velocity (m/s) |

| natural coordinates |

| density (kg/m |

| dynamic viscosity (N×s/m |

| domain of element e |

| penalty parameter |

| k element shape function |