WebThe Biot number is where is the convective heat transfer coefficient ( ), is the thermal conductivity ( ) of the material, and is the cross-sectional length of the wall (m). The lumped capacitance method, which assumes a uniform temperature distribution through the wall, is only a function of the wall thickness and not a function of position ... WebAnswer (1 of 4): These are two dimensionless quantities in heat transfer. Nusselt number is nothing but the ratio of convective to conductive heat transfer across any boundary in a fluid domain. Since fluid particles can move , conductive heat transfer is taken by assuming that the fluid is stagn...
Dimensionless Numbers In Heat Transfer - Engineering Units
WebThe Biot number is given by: Bi = hL/k. where . h = convective heat transfer coefficient, k = thermal conductivity. L = characteristic length. It is a ratio of the temperature drop in the solid material and the temperature dropthe solid and the fluid. So when the Bi <<1 , most of the temperature drop is in the fluid and the solid may be ... Webis called the Fourier number (Fo). • hL/k is the Biot number (Bi). • The one-dimensional transient heat conduction problem in a plane wall can be expressed in nondimensional form as (4–12a ... raymond khoury books in order by series
Nusselt number - Wikipedia
WebBiot Number. The Bi number is defined as the ratio of internal heat transfer resistance to external heat transfer resistance and may be written as: (14.41)Bi=LcUkwhere. From: Subsea Engineering Handbook (Second Edition), 2024. View all Topics. Add to Mendeley. WebA larger Nusselt number corresponds to more active convection, with turbulent flow typically in the 100–1000 range. A similar non-dimensional property is the Biot number, which … WebDec 2, 2012 · where G is the pressure gradient parameter, Re = V h ρ μ (Reynolds number), Pr = μ α ρ (Prandtl number) E c = V 2 c p (T h − T 0) (Eckert number), B i 1 = γ 1 h k (lower wall Biot number), B i 2 = γ 2 h k (upper wall Biot number). Equation (5) subject to the corresponding boundary conditions in Equation (7) can be solved exactly and we ... raymond khoury templar series in order