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Local heat transfer coefficient Formula

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Local heat transfer coefficient at a particular point on the heat-transfer surface, equal to the local heat flux at this point divided by the local temperature drop. Check FAQs

h x = \frac{C f \cdot ρ fluid \cdot c \cdot u ∞}{2}

h_x - Local Heat Transfer Coefficient?C_f - Local Skin-Friction Coefficient?ρ_fluid - Density of Fluid?c - Specific Heat Capacity?u_∞ - Free Stream Velocity?

Local heat transfer coefficient Example

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Here is how the Local heat transfer coefficient equation looks like with Values.

Here is how the Local heat transfer coefficient equation looks like with Units.

Here is how the Local heat transfer coefficient equation looks like.

500 = \frac{0.0012 \cdot 2.7315 \cdot 4.184 \cdot 70}{2}

500W/m²*K = \frac{0.0012 \cdot 2.7315kg/m³ \cdot 4.184kJ/kg*K \cdot 70m/s}{2}

500 = \frac{0.0012 \cdot 2.7315 \cdot 4.184 \cdot 70}{2}

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Local heat transfer coefficient Solution

Follow our step by step solution on how to calculate Local heat transfer coefficient?

FIRST Step Consider the formula

h x = \frac{C f \cdot ρ fluid \cdot c \cdot u ∞}{2}

Next Step Substitute values of Variables

∴

h x = \frac{0.0012 \cdot 2.7315kg/m³ \cdot 4.184kJ/kg*K \cdot 70m/s}{2}

Next Step Convert Units

∴

h x = \frac{0.0012 \cdot 2.7315kg/m³ \cdot 4184J/(kg*K) \cdot 70m/s}{2}

Next Step Prepare to Evaluate

∴

h x = \frac{0.0012 \cdot 2.7315 \cdot 4184 \cdot 70}{2}

Next Step Evaluate

∴

h x = 499.9999767W/m²*K

LAST Step Rounding Answer

∴

h x = 500W/m²*K

Local heat transfer coefficient Formula Elements

Variables

Local Heat Transfer Coefficient

Local heat transfer coefficient at a particular point on the heat-transfer surface, equal to the local heat flux at this point divided by the local temperature drop.

Symbol: h_x

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Local Heat Transfer Coefficient

Local Skin-Friction Coefficient

Local Skin-Friction Coefficient specifies the fraction of the local dynamic pressure.

Symbol: C_f

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Local Skin-Friction Coefficient

Density of Fluid

Density of Fluid is defined as the mass of fluid per unit volume of the said fluid.

Symbol: ρ_fluid

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Density of Fluid

Specific Heat Capacity

Specific Heat Capacity is the heat required to raise the temperature of the unit mass of a given substance by a given amount.

Symbol: c

Measurement: Specific Heat CapacityUnit: kJ/kg*K

Note: Value can be positive or negative.

Formulas to find Specific Heat Capacity

Free Stream Velocity

Free Stream Velocity is defined as at some distance above the boundary the velocity reaches a constant value that is free stream velocity.

Symbol: u_∞

Measurement: SpeedUnit: m/s

Note: Value can be positive or negative.

Formulas to find Free Stream Velocity

Other formulas in Reynolds Analogy category

Go Density of fluid flowing over flat plate

ρ fluid = \frac{2 \cdot h x}{C f \cdot c \cdot u ∞}

Go Free stream velocity of fluid flowing over flat plate

u ∞ = \frac{2 \cdot h x}{ρ fluid \cdot c \cdot C f}

Go Local skin friction coefficient

C f = \frac{2 \cdot h x}{ρ fluid \cdot c \cdot u ∞}

Go Specific heat capacity of fluid flowing over flat plate

c = \frac{2 \cdot h x}{ρ fluid \cdot C f \cdot u ∞}

How to Evaluate Local heat transfer coefficient?

Local heat transfer coefficient evaluator uses Local Heat Transfer Coefficient = (Local Skin-Friction Coefficient*Density of Fluid*Specific Heat Capacity*Free Stream Velocity)/2 to evaluate the Local Heat Transfer Coefficient, Local heat transfer coefficient formula is defined as a measure of convective heat transfer between a solid surface and a fluid in motion, characterizing the heat transfer rate per unit area per unit temperature difference, commonly used in flow over flat plate scenarios. Local Heat Transfer Coefficient is denoted by h_x symbol.

How to evaluate Local heat transfer coefficient using this online evaluator? To use this online evaluator for Local heat transfer coefficient, enter Local Skin-Friction Coefficient (C_f), Density of Fluid (ρ_fluid), Specific Heat Capacity (c) & Free Stream Velocity (u_∞) and hit the calculate button.

FAQs on Local heat transfer coefficient

What is the formula to find Local heat transfer coefficient?

The formula of Local heat transfer coefficient is expressed as Local Heat Transfer Coefficient = (Local Skin-Friction Coefficient*Density of Fluid*Specific Heat Capacity*Free Stream Velocity)/2. Here is an example- 224.2362 = (0.00125*2.731494*4184*70)/2.

How to calculate Local heat transfer coefficient?

With Local Skin-Friction Coefficient (C_f), Density of Fluid (ρ_fluid), Specific Heat Capacity (c) & Free Stream Velocity (u_∞) we can find Local heat transfer coefficient using the formula - Local Heat Transfer Coefficient = (Local Skin-Friction Coefficient*Density of Fluid*Specific Heat Capacity*Free Stream Velocity)/2.

Can the Local heat transfer coefficient be negative?

Yes, the Local heat transfer coefficient, measured in Heat Transfer Coefficient can be negative.

Which unit is used to measure Local heat transfer coefficient?

Local heat transfer coefficient 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 Local heat transfer coefficient can be measured.

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Local heat transfer coefficient Formula

Local heat transfer coefficient Example

Local heat transfer coefficient Solution

Local heat transfer coefficient Formula Elements

Other formulas in Reynolds Analogy category

How to Evaluate Local heat transfer coefficient?

FAQs on Local heat transfer coefficient

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