A thermal mixing model of crossflow in tube bundles for use with the porous body approximation
- Lockheed Martin Corp., Schenectady, NY (United States)
- RPI, Troy, NY (United States)
Diffusive thermal mixing in a heated tube bundle with a cooling fluid in crossflow was analyzed numerically. From the results of detailed two-dimensional models, which calculated the diffusion of heat downstream of one heated tube in an otherwise adiabatic flow field, a diffusion model appropriate for use with the porous body method was developed. The model accounts for both molecular and turbulent diffusion of heat by determining the effective thermal conductivity in the porous region. The model was developed for triangular shaped staggered tube bundles with pitch to diameter ratios between 1.10 and 2.00 and for Reynolds numbers between 1,000 and 20,000. The tubes are treated as nonconducting. Air and water were considered as working fluids. The effective thermal conductivity was found to be linearly dependent on the tube Reynolds number and fluid Prandtl number, and dependent on the bundle geometry. The porous body thermal mixing model was then compared against numerical models for flows with multiple heated tubes with very good agreement.
- Research Organization:
- Knolls Atomic Power Lab. (KAPL), Niskayuna, NY (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Nuclear Energy, Washington, DC (United States)
- DOE Contract Number:
- AC12-76SN00052
- OSTI ID:
- 350934
- Report Number(s):
- KAPL-P-000017; K-95156; CONF-9606420-; ON: DE99002678; TRN: AHC29921%%119
- Resource Relation:
- Conference: International conference on porous media and it`s applications, Kona, HI (United States), 16-21 Jun 1996; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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