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Title: Report of Separate Effects Testing for Modeling of Metallic Fuel Casting Process

Abstract

In order to give guidance regarding the best investment of time and effort in experimental determination of parameters defining the casting process, a Flow-3D model of the casting process was used to investigate the most influential parameters regarding void fraction of the solidified rods and solidification speed for fluid flow parameters, liquid heat transfer parameters, and solid heat transfer parameters. Table 1 summarizes the most significant variables for each of the situations studied. A primary, secondary, and tertiary effect is provided for fluid flow parameters (impacts void fraction) and liquid heat transfer parameters (impacts solidification). In Table 1, the wetting angle represents the angle between the liquid and mold surface as pictured in Figure 1. The viscosity is the dynamic viscosity of the liquid and the surface tension is the property of the surface of a liquid that allows it to resist an external force. When only considering solid heat transfer properties, the variations from case to case were very small. Details on this conclusion are provided in the section considering solid heat transfer properties. The primary recommendation of the study is to measure the fluid flow parameters, specifically the wetting angle, surface tension, and dynamic viscosity, in order ofmore » importance, as well as the heat transfer parameters latent heat and specific heat of the liquid alloy. The wetting angle and surface tension can be measured simultaneously using the sessile drop method. It is unclear whether there is a temperature dependency in these properties. Thus measurements for all three parameters are requested at 1340, 1420, and 1500 degrees Celsius, which correspond to the minimum, middle, and maximum temperatures of the liquid alloy during the process. In addition, the heat transfer coefficient between the mold and liquid metal, the latent heat of transformation, and the specific heat of the liquid metal all have strong influences on solidification. These parameters should be measured to achieve better simulation fidelity. Information on all the mentioned parameters is virtually nonexistent. Presently, all the parameters within the casting model are estimates based on pure U, or another alloy such as U-Ni.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2]
  1. Los Alamos National Laboratory
  2. Idaho National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
DOE/LANL
OSTI Identifier:
1045387
Report Number(s):
LA-UR-12-22617
TRN: US201215%%184
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; ALLOYS; CASTING; FLUID FLOW; HEAT TRANSFER; LIQUID METALS; RECOMMENDATIONS; SIMULATION; SOLIDIFICATION; SPECIFIC HEAT; SURFACE TENSION; TESTING; THERMODYNAMIC PROPERTIES; VELOCITY; VISCOSITY; VOID FRACTION

Citation Formats

Crapps, Justin M., Galloway, Jack D., Decroix, David S., Korzekwa, David A., Aikin, Robert M. Jr., Unal, Cetin, Fielding, R., and Kennedy, R. Report of Separate Effects Testing for Modeling of Metallic Fuel Casting Process. United States: N. p., 2012. Web. doi:10.2172/1045387.
Crapps, Justin M., Galloway, Jack D., Decroix, David S., Korzekwa, David A., Aikin, Robert M. Jr., Unal, Cetin, Fielding, R., & Kennedy, R. Report of Separate Effects Testing for Modeling of Metallic Fuel Casting Process. United States. doi:10.2172/1045387.
Crapps, Justin M., Galloway, Jack D., Decroix, David S., Korzekwa, David A., Aikin, Robert M. Jr., Unal, Cetin, Fielding, R., and Kennedy, R. Fri . "Report of Separate Effects Testing for Modeling of Metallic Fuel Casting Process". United States. doi:10.2172/1045387. https://www.osti.gov/servlets/purl/1045387.
@article{osti_1045387,
title = {Report of Separate Effects Testing for Modeling of Metallic Fuel Casting Process},
author = {Crapps, Justin M. and Galloway, Jack D. and Decroix, David S. and Korzekwa, David A. and Aikin, Robert M. Jr. and Unal, Cetin and Fielding, R. and Kennedy, R},
abstractNote = {In order to give guidance regarding the best investment of time and effort in experimental determination of parameters defining the casting process, a Flow-3D model of the casting process was used to investigate the most influential parameters regarding void fraction of the solidified rods and solidification speed for fluid flow parameters, liquid heat transfer parameters, and solid heat transfer parameters. Table 1 summarizes the most significant variables for each of the situations studied. A primary, secondary, and tertiary effect is provided for fluid flow parameters (impacts void fraction) and liquid heat transfer parameters (impacts solidification). In Table 1, the wetting angle represents the angle between the liquid and mold surface as pictured in Figure 1. The viscosity is the dynamic viscosity of the liquid and the surface tension is the property of the surface of a liquid that allows it to resist an external force. When only considering solid heat transfer properties, the variations from case to case were very small. Details on this conclusion are provided in the section considering solid heat transfer properties. The primary recommendation of the study is to measure the fluid flow parameters, specifically the wetting angle, surface tension, and dynamic viscosity, in order of importance, as well as the heat transfer parameters latent heat and specific heat of the liquid alloy. The wetting angle and surface tension can be measured simultaneously using the sessile drop method. It is unclear whether there is a temperature dependency in these properties. Thus measurements for all three parameters are requested at 1340, 1420, and 1500 degrees Celsius, which correspond to the minimum, middle, and maximum temperatures of the liquid alloy during the process. In addition, the heat transfer coefficient between the mold and liquid metal, the latent heat of transformation, and the specific heat of the liquid metal all have strong influences on solidification. These parameters should be measured to achieve better simulation fidelity. Information on all the mentioned parameters is virtually nonexistent. Presently, all the parameters within the casting model are estimates based on pure U, or another alloy such as U-Ni.},
doi = {10.2172/1045387},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {6}
}

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