FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Heat flux to nucleate pool boiling Formula

GoConvective Processes Heat Transfer Coefficient Formula

Fx Copy

LaTeX Copy

Heat Flux is the heat transfer rate per unit area normal to the direction of heat flow. It is denoted by the letter "Q". Check FAQs

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}

Q - Heat Flux?μ_f - Dynamic Viscosity of Fluid?∆H - Change in Enthalpy of Vaporization?ρ_l - Density of Liquid?ρ_v - Density of Vapour?Y - Surface Tension?C_l - Specific Heat of Liquid?ΔT - Excess Temperature?C_s - Constant in Nucleate Boiling?Pr - Prandtl Number?[g] - Gravitational acceleration on Earth?

Heat flux to nucleate pool boiling Example

With values

With units

Only example

Here is how the Heat flux to nucleate pool boiling equation looks like with Values.

Here is how the Heat flux to nucleate pool boiling equation looks like with Units.

Here is how the Heat flux to nucleate pool boiling equation looks like.

69.4281 = 8 \cdot 500 \cdot {(\frac{9.8066 \cdot (4 - 0.5)}{21.8})}^{0.5} \cdot {(\frac{3 \cdot 12}{0.55 \cdot 500 \cdot {(0.7)}^{1.7}})}^{3.0}

69.4281W/m² = 8Pa*s \cdot 500J/mol \cdot {(\frac{9.8066m/s² \cdot (4kg/m³ - 0.5kg/m³)}{21.8N/m})}^{0.5} \cdot {(\frac{3J/(kg*K) \cdot 12K}{0.55 \cdot 500J/mol \cdot {(0.7)}^{1.7}})}^{3.0}

69.4281 = 8 \cdot 500 \cdot {(\frac{9.8066 \cdot (4 - 0.5)}{21.8})}^{0.5} \cdot {(\frac{3 \cdot 12}{0.55 \cdot 500 \cdot {(0.7)}^{1.7}})}^{3.0}

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Physics » Category

Mechanical » Category

Heat and Mass Transfer » fx Heat flux to nucleate pool boiling

Heat flux to nucleate pool boiling Solution

Follow our step by step solution on how to calculate Heat flux to nucleate pool boiling?

FIRST Step Consider the formula

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}

Next Step Substitute values of Variables

∴

Q = 8Pa*s \cdot 500J/mol \cdot {(\frac{[g] \cdot (4kg/m³ - 0.5kg/m³)}{21.8N/m})}^{0.5} \cdot {(\frac{3J/(kg*K) \cdot 12K}{0.55 \cdot 500J/mol \cdot {(0.7)}^{1.7}})}^{3.0}

Next Step Substitute values of Constants

∴

Q = 8Pa*s \cdot 500J/mol \cdot {(\frac{9.8066m/s² \cdot (4kg/m³ - 0.5kg/m³)}{21.8N/m})}^{0.5} \cdot {(\frac{3J/(kg*K) \cdot 12K}{0.55 \cdot 500J/mol \cdot {(0.7)}^{1.7}})}^{3.0}

Next Step Prepare to Evaluate

∴

Q = 8 \cdot 500 \cdot {(\frac{9.8066 \cdot (4 - 0.5)}{21.8})}^{0.5} \cdot {(\frac{3 \cdot 12}{0.55 \cdot 500 \cdot {(0.7)}^{1.7}})}^{3.0}

Next Step Evaluate

∴

Q = 69.4281385117412W/m²

LAST Step Rounding Answer

∴

Q = 69.4281W/m²

Heat flux to nucleate pool boiling Formula Elements

Variables

Constants

Heat Flux

Heat Flux is the heat transfer rate per unit area normal to the direction of heat flow. It is denoted by the letter "Q".

Symbol: Q

Measurement: Heat Flux DensityUnit: W/m²

Note: Value can be positive or negative.

Formulas to find Heat Flux

Dynamic Viscosity of Fluid

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

Symbol: μ_f

Measurement: Dynamic ViscosityUnit: Pa*s

Note: Value can be positive or negative.

Formulas to find Dynamic Viscosity of Fluid

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

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

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

Surface Tension

Surface Tension is the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.

Symbol: Y

Measurement: Surface TensionUnit: N/m

Note: Value should be greater than 0.

Formulas to find Surface Tension

Specific Heat of Liquid

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

Symbol: C_l

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

Note: Value can be positive or negative.

Formulas to find Specific Heat of Liquid

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

Constant in Nucleate Boiling

Constant in Nucleate Boiling is a constant term used in the nucleate pool boiling equation.

Symbol: C_s

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Constant in Nucleate Boiling

Prandtl Number

Prandtl Number (Pr) or Prandtl group is a dimensionless number, named after the German physicist Ludwig Prandtl, defined as the ratio of momentum diffusivity to thermal diffusivity.

Symbol: Pr

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Prandtl Number

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 Flux

Go Convective Processes Heat Transfer Coefficient

Q = h t \cdot (T w - T aw)

Other formulas in Boiling category

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}

Go Critical heat flux to nucleate pool boiling

Q c = 0.18 \cdot ∆H \cdot ρ v \cdot {(\frac{Y \cdot [g] \cdot (ρ l - ρ v)}{{ρ v}^{2}})}^{0.25}

How to Evaluate Heat flux to nucleate pool boiling?

Heat flux to nucleate pool boiling evaluator uses Heat Flux = Dynamic Viscosity of Fluid*Change in Enthalpy of Vaporization*(([g]*(Density of Liquid-Density of Vapour))/(Surface Tension))^0.5*((Specific Heat of Liquid*Excess Temperature)/(Constant in Nucleate Boiling*Change in Enthalpy of Vaporization*(Prandtl Number)^1.7))^3.0 to evaluate the Heat Flux, The Heat flux to nucleate pool boiling formula is defined as the amount of heat energy passing through a certain surface. Heat Flux is denoted by Q symbol.

How to evaluate Heat flux to nucleate pool boiling using this online evaluator? To use this online evaluator for Heat flux to nucleate pool boiling, enter Dynamic Viscosity of Fluid (μ_f), Change in Enthalpy of Vaporization (∆H), Density of Liquid (ρ_l), Density of Vapour (ρ_v), Surface Tension (Y), Specific Heat of Liquid (C_l), Excess Temperature (ΔT), Constant in Nucleate Boiling (C_s) & Prandtl Number (Pr) and hit the calculate button.

FAQs on Heat flux to nucleate pool boiling

What is the formula to find Heat flux to nucleate pool boiling?

The formula of Heat flux to nucleate pool boiling is expressed as Heat Flux = Dynamic Viscosity of Fluid*Change in Enthalpy of Vaporization*(([g]*(Density of Liquid-Density of Vapour))/(Surface Tension))^0.5*((Specific Heat of Liquid*Excess Temperature)/(Constant in Nucleate Boiling*Change in Enthalpy of Vaporization*(Prandtl Number)^1.7))^3.0. Here is an example- 69.42814 = 8*500*(([g]*(4-0.5))/(21.8))^0.5*((3*12)/(0.55*500*(0.7)^1.7))^3.0.

How to calculate Heat flux to nucleate pool boiling?

With Dynamic Viscosity of Fluid (μ_f), Change in Enthalpy of Vaporization (∆H), Density of Liquid (ρ_l), Density of Vapour (ρ_v), Surface Tension (Y), Specific Heat of Liquid (C_l), Excess Temperature (ΔT), Constant in Nucleate Boiling (C_s) & Prandtl Number (Pr) we can find Heat flux to nucleate pool boiling using the formula - Heat Flux = Dynamic Viscosity of Fluid*Change in Enthalpy of Vaporization*(([g]*(Density of Liquid-Density of Vapour))/(Surface Tension))^0.5*((Specific Heat of Liquid*Excess Temperature)/(Constant in Nucleate Boiling*Change in Enthalpy of Vaporization*(Prandtl Number)^1.7))^3.0. This formula also uses Gravitational acceleration on Earth constant(s).

What are the other ways to Calculate Heat Flux?

Here are the different ways to Calculate Heat Flux-

Heat Flux=Heat Transfer Coefficient*(Surface Temperature-Recovery Temperature)

Can the Heat flux to nucleate pool boiling be negative?

Yes, the Heat flux to nucleate pool boiling, measured in Heat Flux Density can be negative.

Which unit is used to measure Heat flux to nucleate pool boiling?

Heat flux to nucleate pool boiling is usually measured using the Watt per Square Meter[W/m²] for Heat Flux Density. Kilowatt per Square Meter[W/m²], Watt per Square Centimeter[W/m²], Watt per Square Inch[W/m²] are the few other units in which Heat flux to nucleate pool boiling can be measured.

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit

Heat flux to nucleate pool boiling Formula

​GoConvective Processes Heat Transfer Coefficient Formula

Heat flux to nucleate pool boiling Example

Heat flux to nucleate pool boiling Solution

Heat flux to nucleate pool boiling Formula Elements

Other Formulas to find Heat Flux

Other formulas in Boiling category

How to Evaluate Heat flux to nucleate pool boiling?

FAQs on Heat flux to nucleate pool boiling

Variable Name

GoConvective Processes Heat Transfer Coefficient Formula