TY - JOUR
TI - Second law analysis of laminar forced convection in a rotating curved duct
AU - Razavi Seyed Esmail
AU - Soltanipour Hosseinali
AU - Choupani Parisa
JN - Thermal Science
PY - 2015
VL - 19
IS - 1
SP - 95
EP - 107
PT - Article
AB - In this paper, flow characteristics, heat transfer and entropy generation in  a rotating curved duct are studied numerically. The continuity, Navier-Stokes  and energy equations are solved using control volume method. The effects of  Dean number, non-dimensional wall heat flux, and force ratio (the ratio of  Coriolis to centrifugal forces) on the entropy generation due to friction and  heat transfer irreversibility and also overall entropy generation are  presented. Optimal thermal operating conditions (based on dimensionless  parameters) are determined from the viewpoint of thermodynamics second law.  The comparison of numerical results at different force ratios indicates that  for any fixed Dean number or non-dimensional heat flux, the minimal  frictional entropy generation occurs when the Coriolis and centrifugal forces  have the same value but in the opposite direction. For a specific  non-dimensional heat flux, there is a force ratio with maximum heat transfer  irreversibility which depends on Dean number. Based on optimal analysis, the  optimal force ratio with minimal total entropy generation depends on heat  flux and Dean number.