### Abstract

An inverse analysis utilizing the conjugate gradient method of minimization and adjoint equation is used successfully to solve the inverse problem in estimating the temperature dependent thermal conductivity of a composite material. No prior information is available on the functional form of the unknown thermal conductivity in the present study, thus, it is classified as the function estimation in inverse calculation. The accuracy of the inverse analysis is examined by using the simulated exact and inexact measurements that were obtained within the medium. Results show that an excellent estimation on the thermal conductivity can be obtained within a very short CPU time in VAX-9420 computer with any arbitrary initial guesses by using just boundary measurements (including the boundaries between different materials). The advantages of applying the present algorithm in inverse analysis can greatly simplify the experimental set up, diminish the sensitivity to the measurement errors and reduce the CPU time in inverse calculation, while the reliable predictions can still be achieved.

Original language | English |
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Title of host publication | 5th International Offshore and Polar Engineering Conference, ISOPE 1995 |

Publisher | International Society of Offshore and Polar Engineers |

Pages | 264-270 |

Number of pages | 7 |

ISBN (Print) | 1880653168 |

Publication status | Published - 1995 Jan 1 |

Event | 5th International Offshore and Polar Engineering Conference, ISOPE 1995 - The Hague, Netherlands Duration: 1995 Jun 11 → 1995 Jun 16 |

### Publication series

Name | Proceedings of the International Offshore and Polar Engineering Conference |
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Volume | 1995-June |

ISSN (Print) | 1098-6189 |

ISSN (Electronic) | 1555-1792 |

### Other

Other | 5th International Offshore and Polar Engineering Conference, ISOPE 1995 |
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Country | Netherlands |

City | The Hague |

Period | 95-06-11 → 95-06-16 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Energy Engineering and Power Technology
- Ocean Engineering
- Mechanical Engineering

### Cite this

*5th International Offshore and Polar Engineering Conference, ISOPE 1995*(pp. 264-270). (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 1995-June). International Society of Offshore and Polar Engineers.

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*5th International Offshore and Polar Engineering Conference, ISOPE 1995.*Proceedings of the International Offshore and Polar Engineering Conference, vol. 1995-June, International Society of Offshore and Polar Engineers, pp. 264-270, 5th International Offshore and Polar Engineering Conference, ISOPE 1995, The Hague, Netherlands, 95-06-11.

**An inverse problem of estimating temperature dependent thermal conductivity in composite material.** / Huang, Cheng-Hung; Yan, Jan Yuan.

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

TY - GEN

T1 - An inverse problem of estimating temperature dependent thermal conductivity in composite material

AU - Huang, Cheng-Hung

AU - Yan, Jan Yuan

PY - 1995/1/1

Y1 - 1995/1/1

N2 - An inverse analysis utilizing the conjugate gradient method of minimization and adjoint equation is used successfully to solve the inverse problem in estimating the temperature dependent thermal conductivity of a composite material. No prior information is available on the functional form of the unknown thermal conductivity in the present study, thus, it is classified as the function estimation in inverse calculation. The accuracy of the inverse analysis is examined by using the simulated exact and inexact measurements that were obtained within the medium. Results show that an excellent estimation on the thermal conductivity can be obtained within a very short CPU time in VAX-9420 computer with any arbitrary initial guesses by using just boundary measurements (including the boundaries between different materials). The advantages of applying the present algorithm in inverse analysis can greatly simplify the experimental set up, diminish the sensitivity to the measurement errors and reduce the CPU time in inverse calculation, while the reliable predictions can still be achieved.

AB - An inverse analysis utilizing the conjugate gradient method of minimization and adjoint equation is used successfully to solve the inverse problem in estimating the temperature dependent thermal conductivity of a composite material. No prior information is available on the functional form of the unknown thermal conductivity in the present study, thus, it is classified as the function estimation in inverse calculation. The accuracy of the inverse analysis is examined by using the simulated exact and inexact measurements that were obtained within the medium. Results show that an excellent estimation on the thermal conductivity can be obtained within a very short CPU time in VAX-9420 computer with any arbitrary initial guesses by using just boundary measurements (including the boundaries between different materials). The advantages of applying the present algorithm in inverse analysis can greatly simplify the experimental set up, diminish the sensitivity to the measurement errors and reduce the CPU time in inverse calculation, while the reliable predictions can still be achieved.

UR - http://www.scopus.com/inward/record.url?scp=85054823750&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85054823750&partnerID=8YFLogxK

M3 - Conference contribution

SN - 1880653168

T3 - Proceedings of the International Offshore and Polar Engineering Conference

SP - 264

EP - 270

BT - 5th International Offshore and Polar Engineering Conference, ISOPE 1995

PB - International Society of Offshore and Polar Engineers

ER -