Simultaneous determination of temperature-dependent thermal conductivity and volumetric heat capacity by an inverse technique
- Univ. of Alabama, Tuscaloosa, AL (United States). Mechanical Engineering Dept.
Determination of thermal properties by inverse methods often involves limited thermal excitation of a relatively small sample. If these thermal properties are to be found as functions of temperature, then this procedure must be replicated at several artificially elevated temperatures. For some types of materials (for example, those bearing moisture) this approach is impractical. In this paper, a procedure is developed for determining thermal properties (conductivity k and volumetric heat capacity C {equivalent_to} {rho}c{sub p}) as functions of temperature from a single experiment. This procedure is targeted for determination of k(T) and C(T) for sand molds used in castings. An inverse method based on a Gauss linearization is used to estimate these functions. The experiment used to determine these properties consists of heating a one-dimensional specimen of the material from one end. The variation of thermal properties with temperature is assumed to be a piecewise linear function, with values of properties to be determined at prescribed temperatures. A numerical experiment is used to demonstrate the technique.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 477372
- Report Number(s):
- CONF-961105-; ISBN 0-7918-1519-6; TRN: IM9724%%249
- Resource Relation:
- Conference: 1996 international mechanical engineering congress and exhibition, Atlanta, GA (United States), 17-22 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of ASME Heat Transfer Division: Proceedings. Volume 1: Heat transfer in microgravity systems, radiative heat transfer and radiative heat transfer in low-temperature environments, and thermal contact conductance and inverse problems in heat transfer; HTD-Volume 332; Gopinath, A. [ed.] [Naval Postgraduate School, Monterey, CA (United States)]; Sadhal, S.S. [ed.] [Univ. of Southern California, Los Angeles, CA (United States)]; Jones, P.D. [ed.] [Auburn Univ., AL (United States)]; Seyed-Yagoobi, J. [ed.] [Texas A and M Univ., College Station, TX (United States)]; Woodbury, K.A. [ed.] [Univ. of Alabama, Tuscaloosa, AL (United States)]; PB: 281 p.
- Country of Publication:
- United States
- Language:
- English
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