Q31 Eddy diffusion calculation A stream of air at 100 kPa and 300 K is flowing on the top surface of a thin flat sheet of solid naphthalene of length 0.2 m with a velocity of 20 m/sec. The other data are: Mass diffusivity of naphthalene vapor in air = 6*106 m²/sec Kinematic viscosity of air = 1.5 * 10.5 m²/sec Concentration of naphthalene at the air-solid naphthalene interface = 1*105 kmol/m³ Sh= 0.664Re/Sc¹/3 where Re, p " Calculate: (a) The everage mass transfer coefficient over the flat plate (b) The rate of loss of naphthalene from the surface per unit width

Elements Of Electromagnetics
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Q3]
Eddy diffusion calculation
A stream of air at 100 kPa and 300 K is flowing on the top surface of a thin flat sheet of solid naphthalene of
length 0.2 m with a velocity of 20 m/sec. The other data are:
Mass diffusivity of naphthalene vapor in air = 6*106 m²/sec
Kinematic viscosity of air= 1.5 * 10-³ m²/sec
Concentration of naphthalene at the air-solid naphthalene interface = 1*105 kmol/m³
Sh = 0.664 Re/Sc¹/3 where Re₁ = lvp
μ
Calculate:
(a) The overage mass transfer coefficient over the flat plate
(b) The rate of loss of naphthalene from the surface per unit width
Transcribed Image Text:Q3] Eddy diffusion calculation A stream of air at 100 kPa and 300 K is flowing on the top surface of a thin flat sheet of solid naphthalene of length 0.2 m with a velocity of 20 m/sec. The other data are: Mass diffusivity of naphthalene vapor in air = 6*106 m²/sec Kinematic viscosity of air= 1.5 * 10-³ m²/sec Concentration of naphthalene at the air-solid naphthalene interface = 1*105 kmol/m³ Sh = 0.664 Re/Sc¹/3 where Re₁ = lvp μ Calculate: (a) The overage mass transfer coefficient over the flat plate (b) The rate of loss of naphthalene from the surface per unit width
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