WebThe Biot number must generally be less than 0.1 for usefully accurate approximation and heat transfer analysis. The mathematical solution to the lumped-system approximation gives Newton's law of cooling. A Biot number greater than 0.1 (a "thermally thick" substance) ... WebThe Biot number is a dimensionless quantity used in heat transfer calculations. It determines whether or not the temperatures inside a body will vary significantly in space, while the body heats or cools over time, from a thermal gradient applied to its surface. The Biot number equals the product of the heat transfer coefficient and the ...

17.3 Dimensionless Numbers and Analysis of Results

The Biot number (Bi) is a dimensionless quantity used in heat transfer calculations, named for the eighteenth-century French physicist Jean-Baptiste Biot (1774–1862). The Biot number is the ratio of the thermal resistance for conduction inside a body to the resistance for convection at the surface of the … See more The Biot number is defined as: $${\displaystyle \mathrm {Bi} ={\frac {h}{k}}L}$$ where: • $${\displaystyle {k}}$$ is the thermal conductivity of … See more • Convection • Fourier number • Heat conduction See more The value of the Biot number can indicate the applicability (or inapplicability) of certain methods of solving transient heat transfer problems. … See more An analogous version of the Biot number (usually called the "mass transfer Biot number", or $${\displaystyle \mathrm {Bi} _{m}}$$) is also used in mass diffusion processes: $${\displaystyle \mathrm {Bi} _{m}={\frac {k_{c}}{D}}L}$$ See more WebBiot number: The biot number represents the distribution of temperature within the body. Biot number is defined as the ratio of conductive resistance of the body to the convective resistance on the surface of the body. Mathematically it is given by, Bi = `\frac{\text{Internal conductive resistance}}{\text{External convective resistance}}` ... how to paint newly plastered walls

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WebThe Biot number is a dimensionless quantity used in heat transfer calculations. It determines whether or not the temperatures inside a body will vary significantly in space, … WebBIOT 1972 Coral/Corals/M arine/Nature/W ildlife/Enviro nment/Conserva tion 4v n4092 BIOT 1972 Coral/Corals/M arine/Nature/W ildlife/Enviro nment/Conserva tion 4v n4092 Item Information WebThe size of the Biot number thus indicates the regimes where the different effects become important. Figure 17.9 shows the general effect of Biot number on temperature distribution. Figure 17.10 is a plot of the temperature distribution in the cylinder for values of , and . how to paint nickel gap shiplap