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Heat transfer coefficient by convection for stable film boiling Formula

GoHeat transfer coefficient for convection Formula

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Heat Transfer Coefficient by Convection is the heat transferred per unit area per kelvin. Check FAQs

h c = 0.62 \cdot {(\frac{{k v}^{3} \cdot ρ v \cdot [g] \cdot (ρ l - ρ v) \cdot (∆H + (0.68 \cdot C v) \cdot ΔT)}{μ v \cdot D \cdot ΔT})}^{0.25}

h_c - Heat Transfer Coefficient by Convection?k_v - Thermal Conductivity of Vapor?ρ_v - Density of Vapour?ρ_l - Density of Liquid?∆H - Change in Enthalpy of Vaporization?C_v - Specific Heat of Vapour?ΔT - Excess Temperature?μ_v - Dynamic Viscosity of Vapour?D - Diameter?[g] - Gravitational acceleration on Earth?

Heat transfer coefficient by convection for stable film boiling Example

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Here is how the Heat transfer coefficient by convection for stable film boiling equation looks like with Values.

Here is how the Heat transfer coefficient by convection for stable film boiling equation looks like with Units.

Here is how the Heat transfer coefficient by convection for stable film boiling equation looks like.

1.15 = 0.62 \cdot {(\frac{{11.524}^{3} \cdot 0.5 \cdot 9.8066 \cdot (4 - 0.5) \cdot (500 + (0.68 \cdot 5) \cdot 12)}{1000 \cdot 100 \cdot 12})}^{0.25}

1.15W/m²*K = 0.62 \cdot {(\frac{{11.524W/(m*K)}^{3} \cdot 0.5kg/m³ \cdot 9.8066m/s² \cdot (4kg/m³ - 0.5kg/m³) \cdot (500J/mol + (0.68 \cdot 5J/(kg*K)) \cdot 12K)}{1000Pa*s \cdot 100m \cdot 12K})}^{0.25}

1.15 = 0.62 \cdot {(\frac{{11.524}^{3} \cdot 0.5 \cdot 9.8066 \cdot (4 - 0.5) \cdot (500 + (0.68 \cdot 5) \cdot 12)}{1000 \cdot 100 \cdot 12})}^{0.25}

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Heat transfer coefficient by convection for stable film boiling Solution

Follow our step by step solution on how to calculate Heat transfer coefficient by convection for stable film boiling?

FIRST Step Consider the formula

h c = 0.62 \cdot {(\frac{{k v}^{3} \cdot ρ v \cdot [g] \cdot (ρ l - ρ v) \cdot (∆H + (0.68 \cdot C v) \cdot ΔT)}{μ v \cdot D \cdot ΔT})}^{0.25}

Next Step Substitute values of Variables

∴

h c = 0.62 \cdot {(\frac{{11.524W/(m*K)}^{3} \cdot 0.5kg/m³ \cdot [g] \cdot (4kg/m³ - 0.5kg/m³) \cdot (500J/mol + (0.68 \cdot 5J/(kg*K)) \cdot 12K)}{1000Pa*s \cdot 100m \cdot 12K})}^{0.25}

Next Step Substitute values of Constants

∴

h c = 0.62 \cdot {(\frac{{11.524W/(m*K)}^{3} \cdot 0.5kg/m³ \cdot 9.8066m/s² \cdot (4kg/m³ - 0.5kg/m³) \cdot (500J/mol + (0.68 \cdot 5J/(kg*K)) \cdot 12K)}{1000Pa*s \cdot 100m \cdot 12K})}^{0.25}

Next Step Prepare to Evaluate

∴

h c = 0.62 \cdot {(\frac{{11.524}^{3} \cdot 0.5 \cdot 9.8066 \cdot (4 - 0.5) \cdot (500 + (0.68 \cdot 5) \cdot 12)}{1000 \cdot 100 \cdot 12})}^{0.25}

Next Step Evaluate

∴

h c = 1.14999954094302W/m²*K

LAST Step Rounding Answer

∴

h c = 1.15W/m²*K

Heat transfer coefficient by convection for stable film boiling Formula Elements

Variables

Constants

Heat Transfer Coefficient by Convection

Heat Transfer Coefficient by Convection is the heat transferred per unit area per kelvin.

Symbol: h_c

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Heat Transfer Coefficient by Convection

Thermal Conductivity of Vapor

Thermal Conductivity of Vapor is defined as the transport of energy due to random molecular motion across a temperature gradient.

Symbol: k_v

Measurement: Thermal ConductivityUnit: W/(m*K)

Note: Value can be positive or negative.

Formulas to find Thermal Conductivity of Vapor

Density of Vapour

The Density of Vapour is the mass of a unit volume of a material substance.

Symbol: ρ_v

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Density of Vapour

Density of Liquid

Density of Liquid is mass of a unit volume of a material substance.

Symbol: ρ_l

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Density of Liquid

Change in Enthalpy of Vaporization

Change in Enthalpy of Vaporization is the amount of energy (enthalpy) that must be added to a liquid substance to transform a quantity of that substance into a gas.

Symbol: ∆H

Measurement: Energy Per MoleUnit: J/mol

Note: Value can be positive or negative.

Formulas to find Change in Enthalpy of Vaporization

Specific Heat of Vapour

Specific Heat of Vapour is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

Symbol: C_v

Measurement: Specific Heat CapacityUnit: J/(kg*K)

Note: Value can be positive or negative.

Formulas to find Specific Heat of Vapour

Excess Temperature

Excess Temperature is defined as the temperature difference between heat source and saturation temperature of the fluid.

Symbol: ΔT

Measurement: Temperature DifferenceUnit: K

Note: Value can be positive or negative.

Formulas to find Excess Temperature

Dynamic Viscosity of Vapour

Dynamic Viscosity of Vapour is the resistance to movement of one layer of a fluid over another.

Symbol: μ_v

Measurement: Dynamic ViscosityUnit: Pa*s

Note: Value can be positive or negative.

Formulas to find Dynamic Viscosity of Vapour

Diameter

Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.

Symbol: D

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Diameter

Gravitational acceleration on Earth

Gravitational acceleration on Earth means that the velocity of an object in free fall will increase by 9.8 m/s2 every second.

Symbol: [g]

Value: 9.80665 m/s²

Other Formulas to find Heat Transfer Coefficient by Convection

Go Heat transfer coefficient for convection

h c = h - 0.75 \cdot h r

Other formulas in Boiling category

Go Heat flux to nucleate pool boiling

Q = μ f \cdot ∆H \cdot {(\frac{[g] \cdot (ρ l - ρ v)}{Y})}^{0.5} \cdot {(\frac{C l \cdot ΔT}{C s \cdot ∆H \cdot {(Pr)}^{1.7}})}^{3.0}

Go Enthalpy of evaporation to nucleate pool boiling

∆H = {((\frac{1}{Q}) \cdot μ f \cdot {(\frac{[g] \cdot (ρ l - ρ v)}{Y})}^{0.5} \cdot {(\frac{C l \cdot ΔT}{C s \cdot {(Pr)}^{1.7}})}^{3})}^{0.5}

How to Evaluate Heat transfer coefficient by convection for stable film boiling?

Heat transfer coefficient by convection for stable film boiling evaluator uses Heat Transfer Coefficient by Convection = 0.62*((Thermal Conductivity of Vapor^3*Density of Vapour*[g]*(Density of Liquid-Density of Vapour)*(Change in Enthalpy of Vaporization+(0.68*Specific Heat of Vapour)*Excess Temperature))/(Dynamic Viscosity of Vapour*Diameter*Excess Temperature))^0.25 to evaluate the Heat Transfer Coefficient by Convection, Heat transfer coefficient by convection for stable film boiling is a measure of the rate of heat transfer from a solid surface to a fluid when a stable vapor layer (film) forms between them. In film boiling, heat is transferred through the vapor film by conduction and then by convection within the vapor and the surrounding fluid. Heat Transfer Coefficient by Convection is denoted by h_c symbol.

How to evaluate Heat transfer coefficient by convection for stable film boiling using this online evaluator? To use this online evaluator for Heat transfer coefficient by convection for stable film boiling, enter Thermal Conductivity of Vapor (k_v), Density of Vapour (ρ_v), Density of Liquid (ρ_l), Change in Enthalpy of Vaporization (∆H), Specific Heat of Vapour (C_v), Excess Temperature (ΔT), Dynamic Viscosity of Vapour (μ_v) & Diameter (D) and hit the calculate button.

FAQs on Heat transfer coefficient by convection for stable film boiling

What is the formula to find Heat transfer coefficient by convection for stable film boiling?

The formula of Heat transfer coefficient by convection for stable film boiling is expressed as Heat Transfer Coefficient by Convection = 0.62*((Thermal Conductivity of Vapor^3*Density of Vapour*[g]*(Density of Liquid-Density of Vapour)*(Change in Enthalpy of Vaporization+(0.68*Specific Heat of Vapour)*Excess Temperature))/(Dynamic Viscosity of Vapour*Diameter*Excess Temperature))^0.25. Here is an example- 1.15 = 0.62*((11.524^3*0.5*[g]*(4-0.5)*(500+(0.68*5)*12))/(1000*100*12))^0.25.

How to calculate Heat transfer coefficient by convection for stable film boiling?

With Thermal Conductivity of Vapor (k_v), Density of Vapour (ρ_v), Density of Liquid (ρ_l), Change in Enthalpy of Vaporization (∆H), Specific Heat of Vapour (C_v), Excess Temperature (ΔT), Dynamic Viscosity of Vapour (μ_v) & Diameter (D) we can find Heat transfer coefficient by convection for stable film boiling using the formula - Heat Transfer Coefficient by Convection = 0.62*((Thermal Conductivity of Vapor^3*Density of Vapour*[g]*(Density of Liquid-Density of Vapour)*(Change in Enthalpy of Vaporization+(0.68*Specific Heat of Vapour)*Excess Temperature))/(Dynamic Viscosity of Vapour*Diameter*Excess Temperature))^0.25. This formula also uses Gravitational acceleration on Earth constant(s).

What are the other ways to Calculate Heat Transfer Coefficient by Convection?

Here are the different ways to Calculate Heat Transfer Coefficient by Convection-

Heat Transfer Coefficient by Convection=Heat Transfer Coefficient by Boiling-0.75*Heat Transfer Coefficient by Radiation

Can the Heat transfer coefficient by convection for stable film boiling be negative?

Yes, the Heat transfer coefficient by convection for stable film boiling, measured in Heat Transfer Coefficient can be negative.

Which unit is used to measure Heat transfer coefficient by convection for stable film boiling?

Heat transfer coefficient by convection for stable film boiling is usually measured using the Watt per Square Meter per Kelvin[W/m²*K] for Heat Transfer Coefficient. Watt per Square Meter per Celcius[W/m²*K], Joule per Second per Square Meter per Kelvin[W/m²*K], Kilocalorie (IT) per Hour per Square Foot per Celcius[W/m²*K] are the few other units in which Heat transfer coefficient by convection for stable film boiling can be measured.

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Heat transfer coefficient by convection for stable film boiling Formula

​GoHeat transfer coefficient for convection Formula

Heat transfer coefficient by convection for stable film boiling Example

Heat transfer coefficient by convection for stable film boiling Solution

Heat transfer coefficient by convection for stable film boiling Formula Elements

Other Formulas to find Heat Transfer Coefficient by Convection

Other formulas in Boiling category

How to Evaluate Heat transfer coefficient by convection for stable film boiling?

FAQs on Heat transfer coefficient by convection for stable film boiling

Variable Name

GoHeat transfer coefficient for convection Formula