### Abstract

A numerical investigation has been performed on the pressure drop and friction factor of water flow in three different shapes of microchannel heat sinks which are rectangular, trapezoidal, and triangular for Reynolds number range of 100-1000. The three-dimensional steady, laminar flow and heat transfer governing equations are solved using the finite volume method. It is found that the values of Poiseuille number and friction factor depend greatly on different geometrical parameters. It is also inferred that the heat sink having the smallest hydraulic diameter for each type of shapes under consideration has better performance among the other heat sinks studied. The values of Poiseuille number and friction factor increase with the increase of width-height ratio (Wc/Hc) for rectangular microchannels. For trapezoidal microchannels, the Poiseuille number and friction factor increase with the increase of bottom-to-top width ratio (b/a), increase with the decrease of height-to-top width ratio (h/a), increase with the decrease of length-tohydraulic diameter ratio (L/Dh). While for triangular microchannels, the Poiseuille number and friction factor increase with the increase of its tip angle (β). It is identified that the transition Reynolds number from laminar flow to turbulent flow is occurred at 1100.

Original language | English |
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Title of host publication | ICEE 2009 - Proceeding 2009 3rd International Conference on Energy and Environment |

Subtitle of host publication | Advancement Towards Global Sustainability |

Pages | 418-426 |

Number of pages | 9 |

DOIs | |

Publication status | Published - 01 Dec 2009 |

Event | 2009 3rd International Conference on Energy and Environment: Advancement Towards Global Sustainability, ICEE 2009 - Malacca, Malaysia Duration: 07 Dec 2009 → 08 Dec 2009 |

### Other

Other | 2009 3rd International Conference on Energy and Environment: Advancement Towards Global Sustainability, ICEE 2009 |
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Country | Malaysia |

City | Malacca |

Period | 07/12/09 → 08/12/09 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Renewable Energy, Sustainability and the Environment
- Environmental Engineering

### Cite this

*ICEE 2009 - Proceeding 2009 3rd International Conference on Energy and Environment: Advancement Towards Global Sustainability*(pp. 418-426). [5398611] https://doi.org/10.1109/ICEENVIRON.2009.5398611

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*ICEE 2009 - Proceeding 2009 3rd International Conference on Energy and Environment: Advancement Towards Global Sustainability.*, 5398611, pp. 418-426, 2009 3rd International Conference on Energy and Environment: Advancement Towards Global Sustainability, ICEE 2009, Malacca, Malaysia, 07/12/09. https://doi.org/10.1109/ICEENVIRON.2009.5398611

**Pressure drop and friction factor for different shapes of microchannels.** / Gunnasegaran, Prem; Mohammed, H.; Shuaib, N. H.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Pressure drop and friction factor for different shapes of microchannels

AU - Gunnasegaran, Prem

AU - Mohammed, H.

AU - Shuaib, N. H.

PY - 2009/12/1

Y1 - 2009/12/1

N2 - A numerical investigation has been performed on the pressure drop and friction factor of water flow in three different shapes of microchannel heat sinks which are rectangular, trapezoidal, and triangular for Reynolds number range of 100-1000. The three-dimensional steady, laminar flow and heat transfer governing equations are solved using the finite volume method. It is found that the values of Poiseuille number and friction factor depend greatly on different geometrical parameters. It is also inferred that the heat sink having the smallest hydraulic diameter for each type of shapes under consideration has better performance among the other heat sinks studied. The values of Poiseuille number and friction factor increase with the increase of width-height ratio (Wc/Hc) for rectangular microchannels. For trapezoidal microchannels, the Poiseuille number and friction factor increase with the increase of bottom-to-top width ratio (b/a), increase with the decrease of height-to-top width ratio (h/a), increase with the decrease of length-tohydraulic diameter ratio (L/Dh). While for triangular microchannels, the Poiseuille number and friction factor increase with the increase of its tip angle (β). It is identified that the transition Reynolds number from laminar flow to turbulent flow is occurred at 1100.

AB - A numerical investigation has been performed on the pressure drop and friction factor of water flow in three different shapes of microchannel heat sinks which are rectangular, trapezoidal, and triangular for Reynolds number range of 100-1000. The three-dimensional steady, laminar flow and heat transfer governing equations are solved using the finite volume method. It is found that the values of Poiseuille number and friction factor depend greatly on different geometrical parameters. It is also inferred that the heat sink having the smallest hydraulic diameter for each type of shapes under consideration has better performance among the other heat sinks studied. The values of Poiseuille number and friction factor increase with the increase of width-height ratio (Wc/Hc) for rectangular microchannels. For trapezoidal microchannels, the Poiseuille number and friction factor increase with the increase of bottom-to-top width ratio (b/a), increase with the decrease of height-to-top width ratio (h/a), increase with the decrease of length-tohydraulic diameter ratio (L/Dh). While for triangular microchannels, the Poiseuille number and friction factor increase with the increase of its tip angle (β). It is identified that the transition Reynolds number from laminar flow to turbulent flow is occurred at 1100.

UR - http://www.scopus.com/inward/record.url?scp=77949643494&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77949643494&partnerID=8YFLogxK

U2 - 10.1109/ICEENVIRON.2009.5398611

DO - 10.1109/ICEENVIRON.2009.5398611

M3 - Conference contribution

SN - 9781424451456

SP - 418

EP - 426

BT - ICEE 2009 - Proceeding 2009 3rd International Conference on Energy and Environment

ER -