2. Initially, the steel sphere with a diameter of 15 cm with a temperature of 200°C...

2. Initially, the steel sphere with a diameter of 15 cm with a temperature of 200°C was left to cool in the airflow at a temperature of 6 m/s. By making the necessary acceptances, calculate the amount of time the aluminum sphere will fall to a temperature of 50°C.

The relevant correlation for forced transport on the sphere;

NuD = 2 + (0.4 ReD 0.5+ 0.06 ReD 2/3) Pr 0.6 (μo/μy)1/4

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samet mamat answered 7 months ago

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