Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus: Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt

Ahmed O. Erdogdu; Peter S. B. Szabo; Richard Carter; Mery E. Gevrek; Peter Haun; Florian Zaussinger; Bjorn Schulze; Martin Meier; Christoph Egbers

Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus: Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt

Ahmed O. Erdogdu, Peter S. B. Szabo, Richard Carter, Mery E. Gevrek, Peter Haun, Florian Zaussinger, Bjorn Schulze, Martin Meier, Christoph Egbers

Research output: Contribution to conference › Paper › peer-review

Abstract

Natural convection is studied in a differentially heated annulus with its axis aligned in the horizontal direction to induced the so called “crescent shaped pattern” of two axisymmetric counter-rotating convection cells. To investigate this particular temperature and flow pattern the Wollaston shearing interferometry is utilised which serves as the measurement system for the AtmoFlow project, a spherical shell that is designed to investigate atmospheric flow fields on the ISS planned to be launched in 2024. To be able to understand the measured flow fields in the sphere, ground experiments are carried out with the differentially heated annulus. For the sake of simplicity, the system is categorised in three classes, the initial isothermal state where only artificial fringes are measured, the conduction case with symmetric fringes and the convective state where fringes align with the crescent shaped convection pattern.

Original language	English
Publication status	Published - 7 Sept 2021
Event	Fachtagung “Experimentelle Strömungsmechanik” - Bremen, Germany Duration: 7 Sept 2021 → 9 Sept 2021

Conference

Conference	Fachtagung “Experimentelle Strömungsmechanik”
Country/Territory	Germany
City	Bremen
Period	7/09/21 → 9/09/21

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Erdogdu, A. O., Szabo, P. S. B., Carter, R., Gevrek, M. E., Haun, P., Zaussinger, F., Schulze, B., Meier, M., & Egbers, C. (2021). Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus: Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt. Paper presented at Fachtagung “Experimentelle Strömungsmechanik”, Bremen, Germany.

Erdogdu, Ahmed O. ; Szabo, Peter S. B. ; Carter, Richard et al. / Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus : Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt. Paper presented at Fachtagung “Experimentelle Strömungsmechanik”, Bremen, Germany.

@conference{68b38e2625154dbdbc6601c1ade38795,

title = "Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus: Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt",

abstract = "Natural convection is studied in a differentially heated annulus with its axis aligned in the horizontal direction to induced the so called “crescent shaped pattern” of two axisymmetric counter-rotating convection cells. To investigate this particular temperature and flow pattern the Wollaston shearing interferometry is utilised which serves as the measurement system for the AtmoFlow project, a spherical shell that is designed to investigate atmospheric flow fields on the ISS planned to be launched in 2024. To be able to understand the measured flow fields in the sphere, ground experiments are carried out with the differentially heated annulus. For the sake of simplicity, the system is categorised in three classes, the initial isothermal state where only artificial fringes are measured, the conduction case with symmetric fringes and the convective state where fringes align with the crescent shaped convection pattern.",

author = "Erdogdu, {Ahmed O.} and Szabo, {Peter S. B.} and Richard Carter and Gevrek, {Mery E.} and Peter Haun and Florian Zaussinger and Bjorn Schulze and Martin Meier and Christoph Egbers",

year = "2021",

month = sep,

day = "7",

language = "English",

note = "Fachtagung “Experimentelle Str{\"o}mungsmechanik” ; Conference date: 07-09-2021 Through 09-09-2021",

}

Erdogdu, AO, Szabo, PSB, Carter, R, Gevrek, ME, Haun, P, Zaussinger, F, Schulze, B, Meier, M & Egbers, C 2021, 'Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus: Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt', Paper presented at Fachtagung “Experimentelle Strömungsmechanik”, Bremen, Germany, 7/09/21 - 9/09/21.

Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus: Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt. / Erdogdu, Ahmed O.; Szabo, Peter S. B.; Carter, Richard et al.
2021. Paper presented at Fachtagung “Experimentelle Strömungsmechanik”, Bremen, Germany.

Research output: Contribution to conference › Paper › peer-review

TY - CONF

T1 - Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus

T2 - Fachtagung “Experimentelle Strömungsmechanik”

AU - Erdogdu, Ahmed O.

AU - Szabo, Peter S. B.

AU - Carter, Richard

AU - Gevrek, Mery E.

AU - Haun, Peter

AU - Zaussinger, Florian

AU - Schulze, Bjorn

AU - Meier, Martin

AU - Egbers, Christoph

PY - 2021/9/7

Y1 - 2021/9/7

N2 - Natural convection is studied in a differentially heated annulus with its axis aligned in the horizontal direction to induced the so called “crescent shaped pattern” of two axisymmetric counter-rotating convection cells. To investigate this particular temperature and flow pattern the Wollaston shearing interferometry is utilised which serves as the measurement system for the AtmoFlow project, a spherical shell that is designed to investigate atmospheric flow fields on the ISS planned to be launched in 2024. To be able to understand the measured flow fields in the sphere, ground experiments are carried out with the differentially heated annulus. For the sake of simplicity, the system is categorised in three classes, the initial isothermal state where only artificial fringes are measured, the conduction case with symmetric fringes and the convective state where fringes align with the crescent shaped convection pattern.

AB - Natural convection is studied in a differentially heated annulus with its axis aligned in the horizontal direction to induced the so called “crescent shaped pattern” of two axisymmetric counter-rotating convection cells. To investigate this particular temperature and flow pattern the Wollaston shearing interferometry is utilised which serves as the measurement system for the AtmoFlow project, a spherical shell that is designed to investigate atmospheric flow fields on the ISS planned to be launched in 2024. To be able to understand the measured flow fields in the sphere, ground experiments are carried out with the differentially heated annulus. For the sake of simplicity, the system is categorised in three classes, the initial isothermal state where only artificial fringes are measured, the conduction case with symmetric fringes and the convective state where fringes align with the crescent shaped convection pattern.

M3 - Paper

Y2 - 7 September 2021 through 9 September 2021

ER -

Erdogdu AO, Szabo PSB, Carter R, Gevrek ME, Haun P, Zaussinger F et al.. Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus: Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt. 2021. Paper presented at Fachtagung “Experimentelle Strömungsmechanik”, Bremen, Germany.