State the difference between local heat transfer coefficient and average heat transfer coefficient
Answers
Answered by
5
Local and average heat transfer coefficients have been measured for a sphere in a randomly packed bed. A steady state technique was employed in which internally heated spheres were placed in a bed 35 in. deep and 12 in. sq. Air passed through the bed in downflow, the range of Reynolds numbers being from 120 to 1,700 based on the sphere diameter and the superficial velocity.
Average heat transfer coefficients have been measured at twenty‐five positions permitting the assessment of the effect of position. An entrance region limited to the first two particle layers in the bed has been verified.
Distributions of the local heat transfer coefficient on the surface of a single sphere in the top layer and in the nineteenth layer of the bed have also been measured. These distributions indicate that a laminar boundary layer exists over portions of the sphere surface.
Hope it will help u
Mark me as brainlist plzzzzzz
Average heat transfer coefficients have been measured at twenty‐five positions permitting the assessment of the effect of position. An entrance region limited to the first two particle layers in the bed has been verified.
Distributions of the local heat transfer coefficient on the surface of a single sphere in the top layer and in the nineteenth layer of the bed have also been measured. These distributions indicate that a laminar boundary layer exists over portions of the sphere surface.
Hope it will help u
Mark me as brainlist plzzzzzz
Similar questions