Biot Number using Fourier Number Calculator

✖Fourier Number is the ratio of diffusive or conductive transport rate to the quantity storage rate, where the quantity may be either heat or matter.ⓘ Fourier Number [F_o]			+10% -10%
✖Temperature at Any Time T is defined as the temperature of an object at any given time t measured using thermometer.ⓘ Temperature at Any Time T [T]			+10% -10%
✖Temperature of Bulk Fluid is defined as the temperature of bulk fluid or fluid at given instant measured using thermometer.ⓘ Temperature of Bulk Fluid [T_∞]			+10% -10%
✖The Initial temperature of Object is defined as the measure of heat under initial state or conditions.ⓘ Initial Temperature of Object [T₀]			+10% -10%

✖Biot Number is a dimensionless quantity having the ratio of internal conduction resistance to the surface convection resistance.ⓘ Biot Number using Fourier Number [Bi]

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Biot Number using Fourier Number Solution

STEP 0: Pre-Calculation Summary

Formula Used

Biot Number = (-1/Fourier Number)*ln((Temperature at Any Time T-Temperature of Bulk Fluid)/(Initial Temperature of Object-Temperature of Bulk Fluid))
Bi = (-1/F_o)*ln((T-T_∞)/(T₀-T_∞))
This formula uses 1 Functions, 5 Variables

Functions Used

ln - The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function., ln(Number)

Variables Used

Biot Number - Biot Number is a dimensionless quantity having the ratio of internal conduction resistance to the surface convection resistance.
Fourier Number - Fourier Number is the ratio of diffusive or conductive transport rate to the quantity storage rate, where the quantity may be either heat or matter.
Temperature at Any Time T - (Measured in Kelvin) - Temperature at Any Time T is defined as the temperature of an object at any given time t measured using thermometer.
Temperature of Bulk Fluid - (Measured in Kelvin) - Temperature of Bulk Fluid is defined as the temperature of bulk fluid or fluid at given instant measured using thermometer.
Initial Temperature of Object - (Measured in Kelvin) - The Initial temperature of Object is defined as the measure of heat under initial state or conditions.

STEP 1: Convert Input(s) to Base Unit

Fourier Number: 1.134 --> No Conversion Required
Temperature at Any Time T: 589 Kelvin --> 589 Kelvin No Conversion Required
Temperature of Bulk Fluid: 373 Kelvin --> 373 Kelvin No Conversion Required
Initial Temperature of Object: 887.36 Kelvin --> 887.36 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Bi = (-1/F_o)*ln((T-T_∞)/(T₀-T_∞)) --> (-1/1.134)*ln((589-373)/(887.36-373))

Evaluating ... ...

Bi = 0.765119049134103

STEP 3: Convert Result to Output's Unit

0.765119049134103 --> No Conversion Required

FINAL ANSWER

0.765119049134103 ≈ 0.765119 <-- Biot Number

(Calculation completed in 00.008 seconds)

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University School of Chemical Technology-USCT (GGSIPU), New Delhi

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National University of Judicial Science (NUJS), Kolkata

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< Unsteady State Heat Conduction Calculators

Fourier Number using Biot Number

LaTeX Go Fourier Number = (-1/(Biot Number))*ln((Temperature at Any Time T-Temperature of Bulk Fluid)/(Initial Temperature of Object-Temperature of Bulk Fluid))

Biot Number using Fourier Number

LaTeX Go Biot Number = (-1/Fourier Number)*ln((Temperature at Any Time T-Temperature of Bulk Fluid)/(Initial Temperature of Object-Temperature of Bulk Fluid))

Initial Internal Energy Content of Body in Reference to Environment Temperature

LaTeX Go Initial Energy Content = Density of Body*Specific Heat Capacity*Volume of Object*(Initial Temperature of Solid-Ambient Temperature)

Biot Number using Heat Transfer Coefficient

LaTeX Go Biot Number = (Heat Transfer Coefficient*Thickness of Wall)/Thermal Conductivity

Biot Number using Fourier Number Formula

LaTeX Go

Biot Number = (-1/Fourier Number)*ln((Temperature at Any Time T-Temperature of Bulk Fluid)/(Initial Temperature of Object-Temperature of Bulk Fluid))
Bi = (-1/F_o)*ln((T-T_∞)/(T₀-T_∞))

What is Unsteady State Heat Transfer?

Unsteady State Heat Transfer refers to the heat transfer process in which a system's temperature changes with time. This type of heat transfer can happen in different forms, such as conduction, convection, and radiation. It occurs in various systems, including solid materials, fluids, and gases. The heat transfer rate in an unsteady state is directly proportional to the rate of temperature change. This means that the heat transfer rate is not constant and can vary over time. It's an important aspect in the design and optimization of thermal systems, and understanding this process is crucial in many research areas, such as combustion, electronics, and aerospace.

What is Lumped Parameter Model?

Interior temperatures of some bodies remain essentially uniform at all times during a heat transfer process. The temperature of such bodies are only a function of time, T = T(t). The heat transfer analysis based on this idealization is called lumped system analysis.

How to Calculate Biot Number using Fourier Number?

Biot Number using Fourier Number calculator uses Biot Number = (-1/Fourier Number)*ln((Temperature at Any Time T-Temperature of Bulk Fluid)/(Initial Temperature of Object-Temperature of Bulk Fluid)) to calculate the Biot Number, The Biot Number using Fourier Number formula is defined as the function of temperature at any time t , temperature of bulk fluid, initial temperature and fourier number. Biot Number is denoted by Bi symbol.

How to calculate Biot Number using Fourier Number using this online calculator? To use this online calculator for Biot Number using Fourier Number, enter Fourier Number (F_o), Temperature at Any Time T (T), Temperature of Bulk Fluid (T_∞) & Initial Temperature of Object (T₀) and hit the calculate button. Here is how the Biot Number using Fourier Number calculation can be explained with given input values -> 0.765119 = (-1/1.134)*ln((589-373)/(887.36-373)).

FAQ

What is Biot Number using Fourier Number?

The Biot Number using Fourier Number formula is defined as the function of temperature at any time t , temperature of bulk fluid, initial temperature and fourier number and is represented as Bi = (-1/F_o)*ln((T-T_∞)/(T₀-T_∞)) or Biot Number = (-1/Fourier Number)*ln((Temperature at Any Time T-Temperature of Bulk Fluid)/(Initial Temperature of Object-Temperature of Bulk Fluid)). Fourier Number is the ratio of diffusive or conductive transport rate to the quantity storage rate, where the quantity may be either heat or matter, Temperature at Any Time T is defined as the temperature of an object at any given time t measured using thermometer, Temperature of Bulk Fluid is defined as the temperature of bulk fluid or fluid at given instant measured using thermometer & The Initial temperature of Object is defined as the measure of heat under initial state or conditions.

How to calculate Biot Number using Fourier Number?

The Biot Number using Fourier Number formula is defined as the function of temperature at any time t , temperature of bulk fluid, initial temperature and fourier number is calculated using Biot Number = (-1/Fourier Number)*ln((Temperature at Any Time T-Temperature of Bulk Fluid)/(Initial Temperature of Object-Temperature of Bulk Fluid)). To calculate Biot Number using Fourier Number, you need Fourier Number (F_o), Temperature at Any Time T (T), Temperature of Bulk Fluid (T_∞) & Initial Temperature of Object (T₀). With our tool, you need to enter the respective value for Fourier Number, Temperature at Any Time T, Temperature of Bulk Fluid & Initial Temperature of Object and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Biot Number?

In this formula, Biot Number uses Fourier Number, Temperature at Any Time T, Temperature of Bulk Fluid & Initial Temperature of Object. We can use 3 other way(s) to calculate the same, which is/are as follows -

Biot Number = (Heat Transfer Coefficient*Thickness of Wall)/Thermal Conductivity
Biot Number = (Heat Transfer Coefficient*Surface Area for Convection*Time Constant)/(Density of Body*Specific Heat Capacity*Volume of Object*Fourier Number)
Biot Number = (Heat Transfer Coefficient*Time Constant)/(Density of Body*Specific Heat Capacity*Characteristic Dimension*Fourier Number)

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