**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**31598

##### Turbulent Mixing and its Effects on Thermal Fatigue in Nuclear Reactors

**Authors:**
Eggertson,
E.C. Kapulla,
R,
Fokken,
J,
Prasser,
H.M.

**Abstract:**

**Keywords:**
Concentration measurements,
Mixedness,
Stablystratified turbulent isokinetic mixing layer,
Wire mesh sensor

**Digital Object Identifier (DOI):**
doi.org/10.5281/zenodo.1060155

**References:**

[1] S. Chapuliot, C. Gourdin, T. Payen, J.P. Magnaud, and A. Monavaon, "Hydro-thermal-mechanical analysis of thermal fatigue in a mixing tee," in Nuclear Engineering and Design, vol. 235, 2005, pp. 575-596.

[2] K.J. Metzner and U. Wilke, "European THERFAT project - Thermal fatigue evaluation of piping system tee-connections," in Nuclear Engineering and Design, vol. 235, 2004, pp. 473-484.

[3] H.D. Kweon, J.S. Kim, and K.Y. Lee, "Fatigue Design of nuclear class 1 piping considering thermal stratification," in Nuclear Engineering and Design, vol. 238, 2008, pp. 1265-1274.

[4] R. Kapulla, C. Dyck, M. Witte, J. Fokken, A. Leder, "Optical flow and cross correlation techniques for velocity field calculation," in 2009 Conf. Proc. Lasermethoden in der strömungsmesstechnik, pp. 284-295.

[5] J. Fokken, R. Kapulla, S. Kuhn, C. Dyck, H.M. Prasser, "Stably stratified isokinetic turbulent mixing layers: Comparison of PIVmeasurements and numerical calculation," in 2009 Conf. Proc. Lasermethoden in der strömungsmesstechnik, pp. 296-303.

[6] C. Walker, M. Simiano, R. Zboray, and H.M. Prasser, "Investigations on mixing phenomena in single phase flow in a T-junction geometry," in Nuclear Engineering and Design, vol. 239, 2009, pp. 116-126.

[7] H. Rouse and J. Dodu, "Turbulent diffusion across a density discontinuity," in Houille Blanche, vol. 10, 1955, pp. 522-532.

[8] J.S. Turner, "The influence of molecular diffusivity on turbulent entrainment across a density interface," in Journal of Fluid Mechanics, vol. 33, 1968, pp. 639-656.

[9] J.S. Turner, "Buoyancy effects in fluids," Cambridge: University Press, 2nd ed., 1980, 368 pp.

[10] H.J.S. Fernando, "Turbulent mixing in stratified fluids," in Annual Review of Fluid Mechanics, vol. 23, 1991, pp. 455-493.

[11] P. Huq and R. Britter, "Mixing due to grid-generated turbulence of a two-layer scalar profile," in Journal of Fluid Mechanics, vol. 285, 1995, pp. 17-40.

[12] P. Huq and R. Britter, "Turbulence evolution and mixing in a two-layer stably stratified fluid," in Journal of Fluid Mechanics, vol. 285, 1995, pp. 41-67.

[13] E.C. Itsweire, K.N. Helland, and C.W. Van Atta, "Evolution of gridgenerated turbulence in a stably stratified fluid," in Journal of Fluid Mechanics, vol. 162, 1986, pp. 299-338.

[14] T.K. Barrett and C.W. Van Atta, "Experiments on the inhibition of mixing in stably stratified decaying turbulence using LDA and LIF," in Physics of Fluids, vol. 3, 1991, pp. 1321-1332.

[15] Jayesh and Z. Warhaft, "Probability distribution, conditional dissipation, and transport of passive temperature fluctuations in grid generated turbulence," in Physics of Fluids, vol. 4, 1992, pp. 292-307.

[16] Z. Bubnik, P. Kadlec, D. Urban, M. Bruhns, "Sugar Technologists Manual," Bartens pub co. Berlin, 1995, pp. 125-170.

[17] H.M. Prasser, A. Böttger, and J. Zschau, "A new electrode-mesh tomograph for gas-liquid flows," in Flow Measurement and Instrumentation, vol. 9, 1998, pp. 111-119.

[18] J. Fokken, et al, "LIF-measurements and self similarity considerations in a stably stratified isokinetic turbulent mixing layer," in 2010 Conf. Proc. Lasermethoden in der strömungsmesstechnik, pp. 12-19.

[19] J. Fokken, R. Kapulla, G. Galgani, O. Schib, H.M. Prasser, "Stably stratified isokinetic turbulent mixing layers: Investigation in a square flow channel," in 2010 Conf. Proc. International Youth Nuclear Congress, pp. 120.1-120.9.

[20] H. Tenekes, J.L. Lumley, "A first course in turbulence," MIT Press, 1972, 300 pp.

[21] C.G. Koop and F.K. Browand, "Instability and turbulence in a stratified fluid with shear," in Journal of Fluid Mechanics, vol. 93, 1979, pp. 135-159.

[22] Xuequan E. and E.J. Hopfinger, "On mixing across an interface in stably stratified fluid," in Journal of Fluid Mechanics, vol. 166, 1986, pp. 227-244.