Correlações empíricas de tubos circulares
Default

Input data

Corresponding number from table F

Corresponding number from Nu table

Reynolds

Prandtl

Output data

f

Gz

Nusselt

Description

When defining the fluid flow conditions in the circular tube, calculate the Nusselt number (NuNu) and the friction factor (ff).

Table F

NumberCondition
1Laminate
2Turbulent, ReD2104Re_D \leq 2\cdot 10^4
3Turbulent, ReD2104Re_D \geq 2\cdot 10^4
4Turbulent, 3000ReD51063000 \leq Re_D \leq 5\cdot 10^6

Nusselt Table

NumberCondition
1Laminar, uniform Ts
2Laminar, qs"q_s^{"} uniform
3Laminar, combined input, uniform Ts, Pr5Pr \geq 5, properties evaluated at Tm
4Laminar, combined input, uniform qs"q_s^{"}, GzD=ReDPrL/D100Gz_D = \frac{Re_DPr}{L/D} \geq 100, properties evaluated at Tm
5Turbulent, L/D10L/D \geq 10, 0.6Pr1600.6 \leq Pr \leq 160, ReD104Re_D \geq 10^4, TS>TMT_S > T_M, properties evaluated at Tm
6Turbulent, L/D10L/D \geq 10, 0.6Pr1600.6 \leq Pr \leq 160, ReD104Re_D \geq 10^4, TS<TMT_S < T_M, properties evaluated at Tm
7Turbulent, L/D10L/D \geq 10, 0.6Pr167000.6 \leq Pr \leq 16700, ReD104Re_D \geq 10^4, properties evaluated at Tm
8Turbulent, L/D10L/D \geq 10, 0.6Pr20000.6 \leq Pr \leq 2000, 3000ReD51063000 \leq Re_D \leq 5\cdot 10^6, properties evaluated at Tm

Observation

All correlations are evaluated with the fully developed velocity profile, with the exception of the input combines

References

  • WELTY, James R.; RORRER, Gregory L.; FOSTER, David G. Fundamentos de Transferência de Momento, de Calor e de Massa, 6ª edição. Grupo GEN, 2017.