Provide theoretical consideration like principle, formulas regarding the use of air flow rate and preheated synthetic gas in downdraft gasifier in addressing tar formation. Must be mechanical engineering formula and principle pls include like this: 2.1. Thermodynamics 2.1.1.

2.1.2.

2.2. Heat Transfer The above is the example only please do help to determine it. Please provide also little information why it is applicable in the said topic. focus on principle and formula. Add at least 5 and each at least 2 sub topic