Velocity Measurement in High Temperature Liquid Metals Using Calibration Results From the Annular Channel

Argyropoulos, Stavros A.; Mikrovas, Anthony C.; Doutre, Don A.

doi:10.1179/cmq.1996.35.1.85

Cited by 2 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Performing a heat balance to the sphere in a differential time interval, dt, we obtain [16] where h ϭ h(D) is the heat-transfer coefficient and A ϭ A(D) is the surface area (both are dependent on the instantaneous diameter of the sphere). Assuming that the Nusselt number can be expressed as a function of the diameter as Nu ϰ Re 1/2 ϰ D 1/2 , [34,35,36] Eq.…”

Section: Ice Spheresmentioning

confidence: 99%

“…Assuming that the Nusselt number can be expressed as a function of the diameter as Nu ϰ Re 1/2 ϰ D 1/2 , [34,35,36] Eq. [16] can be integrated from the initial diameter (D ϭ D 0 at t ϭ 0) to the final diameter (D ϭ 0 at t ϭ MT). [17] The sphere is assumed to be immersed at a temperature close to its melting point, so there is no sensible heat included in the differential heat balance nor will there be any mass increase due to a solidified shell.…”

Section: Ice Spheresmentioning

confidence: 99%

“…Results showed that the sphere melting time was related linearly to the flow velocity for the specific range of velocities and bath superheats studied. [15][16][17][18] The purpose of the present investigation is to develop a mathematical model to analyze the influence of the various parameters on the melting of an immersed sphere in a liquid metal. This is necessary to achieve a macroscopic view of the system in order to apply the method using the best possible conditions and to know the limitations and errors involved in the measurement.…”

mentioning

confidence: 99%

“…It was demonstrated that the sphere can be used as a probe for measuring the average velocity over the distance equivalent to the diameter of the sphere in a metal flow system. [15][16][17][18] The systems that were chosen for study were baths from commercial purity aluminum and low carbon steel. The experimental calibration setup examined three different elements: (1) it introduced a stationary sphere in a metallic bath of a given temperature and compared its melting rate with that of a moving sphere with known velocity along the circumference of a circle in a metal bath of the same temperature; (2) three different sphere diameters were used (2.5, 3.0, and 3.5 cm); and (3) a range of bath temperatures was investigated.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Measurement of magnitude and direction of velocity in high-temperature liquid metals. Part I: Mathematical modeling

Melissari

Argyropoulos

2005

Metall Mater Trans B

Self Cite

View full text Add to dashboard Cite

This article describes the development of a mathematical model that predicts the time required for a metal sphere to melt in a metal bath under different fluid flow conditions. The sphere is made from the same metal as the bath. The model solves numerically the pertinent momentum and energy equations in three dimensions, employing the SIMPLER algorithm. For the case of a pure metal, the model uses the heat integration algorithm to account for the latent heat of fusion. For the situation of a metal alloy with long freezing range, it incorporates the enthalpy method to account for the latent heat of fusion. The model is validated extensively: first, by using Paterson's analytical solution; second, by using the experimental results of Gallium melting in a rectangular enclosure; and third, by using experimental results involving ice spheres melting in water. The practical use of this model is to study the influence of various parameters in the sphere melting system. This study facilitates the detection of liquid metal velocity using the sphere melting technique.

show abstract

Section: Ice Spheresmentioning

confidence: 99%

Section: Ice Spheresmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Measurement of magnitude and direction of velocity in high-temperature liquid metals. Part I: Mathematical modeling

Melissari

Argyropoulos

2005

Metall Mater Trans B

Self Cite

View full text Add to dashboard Cite

show abstract

Dimensionless correlations for forced convection in liquid metals: Part I. single-phase flow

Argyropoulos

Mikrovas²,

Doutre³

2001

Metall Mater Trans B

Self Cite

View full text Add to dashboard Cite

Two main objectives were addressed in this article. First, a dimensionless heat-transfer correlation for single-phase flow forced convection in liquid aluminum has been derived using a novel experimental method. An aluminum sphere was rotated with a specific tangential velocity in liquid aluminum. Its melting time was measured and correlated with the convective heat-transfer characteristics. The resulting correlation has the following form:The second objective of the study was to assess the accuracy of various correlations using an annular channel, which was available at an independent setting, at the Alcan Research and Development Laboratory. The correlations investigated were those derived from the current experimental work as well as those derived by other investigators, as presented in their respective published work. Results indicated that when applied to liquid metals, theoretically derived equations as well as equations developed for fluids with a Prandtl number greater than 0.7 exhibit a very large error. As such, these equations are unsuitable for liquid metals. A considerably smaller error is exhibited by equations derived experimentally, specifically for liquid metals, thereby attesting to the careful consideration that must be exercised in the choice of correlations that are employed.This study also provides a critical assessment of various exponents used in dimensionless equations for convective heat transfer in liquid metals. While there is a general consensus that the exponent of the Reynolds number is around 0.5, the exponent for the Prandtl number varies considerably.

show abstract

Velocity Measurement in High Temperature Liquid Metals Using Calibration Results From the Annular Channel

Cited by 2 publications

References 2 publications

Measurement of magnitude and direction of velocity in high-temperature liquid metals. Part I: Mathematical modeling

Measurement of magnitude and direction of velocity in high-temperature liquid metals. Part I: Mathematical modeling

Dimensionless correlations for forced convection in liquid metals: Part I. single-phase flow

Contact Info

Product

Resources

About