For a kerosene drop with an initial diameter of 1 mm in air at 700°C and...

For a kerosene drop with an initial diameter of 1 mm in air at 700°C and 1 atm absolute pressure, (a) find the time to vaporize 50%, 90% and 100% of initial mass of the droplet, and (b) what is the mass flow rate from the droplet when the droplet is 50% and 90% vaporized?

Expert Solution

thank you

Amanda K answered 2 years ago

Ice balls of 10 mm diameter at – 30°C are exposed to an air current at...

Ice balls of 10 mm diameter at – 30°C are exposed to an air current at 15°C with a convection heat transfer coefficient of 200 W/m2 -K. Determine the time when the surface layer will begin to melt. Also determine the center temperature. Use the following property values: density = 920 kg/m3 , specific heat 2040 J/kg-K, thermal conductivity = 2.00 W/m-K.

A cylinder 100 mm in diameter and 80 mm long with an initial temperature of 527...

A cylinder 100 mm in diameter and 80 mm long with an initial temperature of 527 C is suddenly exposed to water at 27 C giving a convective heat transfer coefficient of 400 W/m2-K. Determine the temperature at the center of the cylinder after 10 minutes. Assume density is 8050 kg/m3, specific heat is 536 kJ/kg-K, and thermal conductivity is 18.6 W/m-K. **** Not lumped Capacitance Problem. ****

Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 20 m/s, while the...

Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 20 m/s, while the surface of the sphere is maintained at 75°C. What is the rate of heat transfer from the sphere? q = ___ W ? Please provide correct final answer for guaranteed thumbs up rating !

Catalyst pellets of 5 mm diameter are to be fluidized with 45,000 kg/h of air at...

Catalyst pellets of 5 mm diameter are to be fluidized with 45,000 kg/h of air at 1 atm and temp. 30 C in a vertical cylindrical vessel. The density of the catalyst particles is 850 kg/m3; their sphericity is 0.85. The given quantity of air is just sufficient to fluidize the solids. Determine the vessel diameter and terminal velocity. Show pressure drop versus superficial velocity characteristic curve showing both fixed and fluidized bed region. Assume void fraction (under fixed bed...

Air flows in a pipe with a diameter, D=50 mm. The inlet conditions are: M1 =...

Air flows in a pipe with a diameter, D=50 mm. The inlet conditions are: M1 = 3; total pressure, P01 = 1000 kPa absolute; and temperature, T1 = 550 K. The friction coefficient is, f = 0.004. The exit Mach number decreases with the length of the pipe. Plot the following while the exit Mach number to be changed from 2.5 to 0.99 with decrements of ?M=0.01: a) L, length of the pipe that is going to give the desired...

Consider a pipe (diameter of 50 mm) with air flowing through it. The inlet conditions are:...

Consider a pipe (diameter of 50 mm) with air flowing through it. The inlet conditions are: Mach 3; total pressure = 1000 kPa and 550 K. The friction coefficient (f) is 0.004. The exit Mach number decreases with the length of the pipe. Assume adiabatic, steady flow. Write a short Matlab code and plot the following, while the exit Mach number changes from 2.5 to 0.99 with increments of ?M=0.01. Find the length of the pipe that is going to...

Air enters a thin-walled, 5-mm diameter, 2-m-long tube at a uniform inlet temperature of 100°C. A...

Air enters a thin-walled, 5-mm diameter, 2-m-long tube at a uniform inlet temperature of 100°C. A constant heat flux is applied to the air from the tube surface. The mean temperature of air at halfway along the tube (at 1 m length) is reported as 126°C. If the tube surface temperature at the exit is 160°C and the local heat transfer coefficient at the exit is 29.5 W/m^2K, determine a) the applied heat flux, b) the rate of energy increase...

An electric turntable 0.780 mm in diameter is rotating about a fixed axis with an initial...

An electric turntable 0.780 mm in diameter is rotating about a fixed axis with an initial angular velocity of 0.270 rev/s and a constant angular acceleration of 0.885 rev/s^2. A) Compute the angular velocity of the turntable after 0.197 s. B) Through how many revolutions has the turntable spun in this time interval? C) What is the tangential speed of a point on the rim of the turntable at t = 0.197 s? D) What is the magnitude of the...

Two 2.4-mm-diameter beads, C and D, are 11 mm apart, measured between their centers. Bead C...

Two 2.4-mm-diameter beads, C and D, are 11 mm apart, measured between their centers. Bead C has mass 1.0 g and charge 2.5 nC .Bead D has mass 2.0 g and charge -1.0 nC. a) If the beads are released from rest, what is the speed vC of C at the instant the beads collide? b)What is the speed vD of D at the instant the beads collide?

Two 2.1-mm-diameter beads, C and D, are 10 mm apart, measured between their centers. Bead C...

Two 2.1-mm-diameter beads, C and D, are 10 mm apart, measured between their centers. Bead C has mass 1.0 g and charge 1.6 nC. Bead D has mass 2.3 g and charge -1.0 nC. 1) If the beads are released from rest, what is the speed vC of C at the instant the beads collide? 2) What is the speed vD of D at the instant the beads collide?

Question