Numerical time-dependent 3D simulation of flow pattern and heat distribution in an ammonothermal system with various baffle shapes

J. Erlekampf; J. Seebeck; P. Savva; E. Meissner; J. Friedrich; N. S.A. Alt; E. Schlücker; L. Frey

doi:10.1016/j.jcrysgro.2014.06.007

Numerical time-dependent 3D simulation of flow pattern and heat distribution in an ammonothermal system with various baffle shapes

J. Erlekampf, J. Seebeck, P. Savva, E. Meissner, J. Friedrich, N. S.A. Alt, E. Schlücker, L. Frey

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

A numerical analysis of an ammonothermal synthesis process for the bulk growth of nitride crystals was performed. The analysis includes the development of a thermal model for a lab-scale ammonothermal autoclave, which was validated by in situ temperature measurements and applied to tailor the temperature field inside the autoclave. Based on the results of the global thermal 2D simulations, a local 3D model was used to include convective phenomena in the analysis. Moreover, the influence of the baffle and different baffle shapes on the flow velocity was investigated. Fluctuations of the temperature as well as the flow velocities occur, indicating that 3D considerations are essential to accurately investigate the heat and mass transport in ammonothermal systems.

Original language	English (US)
Pages (from-to)	96-104
Number of pages	9
Journal	Journal of Crystal Growth
Volume	403
DOIs	https://doi.org/10.1016/j.jcrysgro.2014.06.007
State	Published - Oct 1 2014
Externally published	Yes

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Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.

Keywords

A1. 3D CFD
A2. Ammonothermal
B1. Nitrides

Publisher link

10.1016/j.jcrysgro.2014.06.007

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title = "Numerical time-dependent 3D simulation of flow pattern and heat distribution in an ammonothermal system with various baffle shapes",

abstract = "A numerical analysis of an ammonothermal synthesis process for the bulk growth of nitride crystals was performed. The analysis includes the development of a thermal model for a lab-scale ammonothermal autoclave, which was validated by in situ temperature measurements and applied to tailor the temperature field inside the autoclave. Based on the results of the global thermal 2D simulations, a local 3D model was used to include convective phenomena in the analysis. Moreover, the influence of the baffle and different baffle shapes on the flow velocity was investigated. Fluctuations of the temperature as well as the flow velocities occur, indicating that 3D considerations are essential to accurately investigate the heat and mass transport in ammonothermal systems.",

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T1 - Numerical time-dependent 3D simulation of flow pattern and heat distribution in an ammonothermal system with various baffle shapes

AU - Erlekampf, J.

AU - Seebeck, J.

AU - Savva, P.

AU - Meissner, E.

AU - Friedrich, J.

AU - Alt, N. S.A.

AU - Schlücker, E.

AU - Frey, L.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - A numerical analysis of an ammonothermal synthesis process for the bulk growth of nitride crystals was performed. The analysis includes the development of a thermal model for a lab-scale ammonothermal autoclave, which was validated by in situ temperature measurements and applied to tailor the temperature field inside the autoclave. Based on the results of the global thermal 2D simulations, a local 3D model was used to include convective phenomena in the analysis. Moreover, the influence of the baffle and different baffle shapes on the flow velocity was investigated. Fluctuations of the temperature as well as the flow velocities occur, indicating that 3D considerations are essential to accurately investigate the heat and mass transport in ammonothermal systems.

AB - A numerical analysis of an ammonothermal synthesis process for the bulk growth of nitride crystals was performed. The analysis includes the development of a thermal model for a lab-scale ammonothermal autoclave, which was validated by in situ temperature measurements and applied to tailor the temperature field inside the autoclave. Based on the results of the global thermal 2D simulations, a local 3D model was used to include convective phenomena in the analysis. Moreover, the influence of the baffle and different baffle shapes on the flow velocity was investigated. Fluctuations of the temperature as well as the flow velocities occur, indicating that 3D considerations are essential to accurately investigate the heat and mass transport in ammonothermal systems.

KW - A1. 3D CFD

KW - A2. Ammonothermal

KW - B1. Nitrides

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JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

ER -

Numerical time-dependent 3D simulation of flow pattern and heat distribution in an ammonothermal system with various baffle shapes

Abstract

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Keywords

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