TY - JOUR

T1 - Limitations of the lumped model for in-tube laminar forced convection interacting with cross forced convection flows

AU - Campo, Antonio

AU - Macia, Yunesky Masip

AU - Arıcı, Müslüm

N1 - Publisher Copyright:
© 2019 Wiley Periodicals, Inc.

PY - 2019/5

Y1 - 2019/5

N2 - The short communication addresses forced convection heat transfer of a viscous fluid flowing in a tube with fully developed laminar velocity and uniform entrance temperature that exchanges heat convection with a surrounding fluid. The idea is to implement the lumped model following the footsteps of the potent lumped model within unsteady heat conduction, instead of the differential model. The computed mean bulk temperatures of the viscous fluid expressed by a simple exponential function agrees well with the baseline numerical mean bulk temperatures when the internal fluid is air, water or crude oil and the external fluid is air for small values of the modified Biot numbers and maximum Reynolds numbers are satisfied.

AB - The short communication addresses forced convection heat transfer of a viscous fluid flowing in a tube with fully developed laminar velocity and uniform entrance temperature that exchanges heat convection with a surrounding fluid. The idea is to implement the lumped model following the footsteps of the potent lumped model within unsteady heat conduction, instead of the differential model. The computed mean bulk temperatures of the viscous fluid expressed by a simple exponential function agrees well with the baseline numerical mean bulk temperatures when the internal fluid is air, water or crude oil and the external fluid is air for small values of the modified Biot numbers and maximum Reynolds numbers are satisfied.

KW - developing temperature

KW - fully developed velocity

KW - heat convection boundary condition

KW - laminar-forced convection

KW - mean bulk temperature

KW - modified Biot number

KW - total heat transfer

KW - two-dimensional energy equation

UR - http://www.scopus.com/inward/record.url?scp=85060127813&partnerID=8YFLogxK

U2 - 10.1002/htj.21419

DO - 10.1002/htj.21419

M3 - Article

AN - SCOPUS:85060127813

SN - 1099-2871

VL - 48

SP - 1032

EP - 1043

JO - Heat Transfer - Asian Research

JF - Heat Transfer - Asian Research

IS - 3

ER -