### Abstract

An investigation of heat transfer with viscoelastic fluids in straight pipes of circular and some non-circular cross-sections is carried out. The influence of the rheological parameters on heat transfer enhancement with viscoelastic fluids in the entrance region of tube flow is investigated with negligible axial heat conduction and viscous dissipation. Numerical simulations are conducted with constant wall heat flux for the Graetz problem using the finite element based software Polyflow for viscoelastic fluids of the simplified Phan-Thien Tanner (SPPT) type. It is found that increasing the fluid elasticity, for all cross-sections, raises the normalized heat transfer coefficient for relatively low elasticity values but for high level of fluid elasticity the normalized heat transfer coefficient decreases.

Original language | English |
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Title of host publication | ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 |

Pages | 149-154 |

Number of pages | 6 |

Volume | 6 |

Edition | PARTS A AND B |

Publication status | Published - Dec 1 2011 |

Event | ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 - Denver, CO, United States Duration: Nov 11 2011 → Nov 17 2011 |

### Other

Other | ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 |
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Country | United States |

City | Denver, CO |

Period | 11/11/11 → 11/17/11 |

### All Science Journal Classification (ASJC) codes

- Mechanical Engineering

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## Cite this

*ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011*(PARTS A AND B ed., Vol. 6, pp. 149-154)