A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon

With the assumption of a polytropic evolution for the lifting gas, the response of an ascending open atmospheric balloon to a monochromatic gravity wave is specified among other parameters by the heat balance with the surrounding air. If one considers the bubble of gas inside the open balloon as a t...

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Autores principales:	De La Torre, Alejandro Eduardo, Alexander, Pedro M., Cornejo, Jorge Norberto
Publicado:	2003
Materias:	Gravity waves Isotherms Meteorological balloons Thermal conductivity of gases Polytropic index measurement Meteorology balloon observation buoyancy heat balance helium hydrogen thermal conductivity
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948763_v42_n2_p325_delaTorre http://hdl.handle.net/20.500.12110/paper_08948763_v42_n2_p325_delaTorre
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_08948763_v42_n2_p325_delaTorre
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spelling	paper:paper_08948763_v42_n2_p325_delaTorre2023-06-08T15:47:58Z A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon De La Torre, Alejandro Eduardo Alexander, Pedro M. Cornejo, Jorge Norberto Gravity waves Isotherms Meteorological balloons Thermal conductivity of gases Polytropic index measurement Meteorology balloon observation buoyancy heat balance helium hydrogen thermal conductivity With the assumption of a polytropic evolution for the lifting gas, the response of an ascending open atmospheric balloon to a monochromatic gravity wave is specified among other parameters by the heat balance with the surrounding air. If one considers the bubble of gas inside the open balloon as a thermodynamic system in contact through the balloon skin with a uniform thermal source (isothermic atmosphere), a relationship between the skin thermal conductivity and the polytropic index for the lifting gas [hydrogen (H2) or helium (He)] may be found. The results for both gases are extended to the case of a typical tropospheric linearly decreasing temperature profile. Constant and variable balloon skin thicknesses are studied for both background temperature profiles. The polytropic index is found to be lower for the changing skin and shows a sensitive difference between the two temperature profiles. The relationship between the thermal conductivity and polytropic index becomes abrupt only when the latter approaches the isothermal or adiabatic values. Fil:de la Torre, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alexander, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cornejo, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948763_v42_n2_p325_delaTorre http://hdl.handle.net/20.500.12110/paper_08948763_v42_n2_p325_delaTorre
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Gravity waves Isotherms Meteorological balloons Thermal conductivity of gases Polytropic index measurement Meteorology balloon observation buoyancy heat balance helium hydrogen thermal conductivity
spellingShingle	Gravity waves Isotherms Meteorological balloons Thermal conductivity of gases Polytropic index measurement Meteorology balloon observation buoyancy heat balance helium hydrogen thermal conductivity De La Torre, Alejandro Eduardo Alexander, Pedro M. Cornejo, Jorge Norberto A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon
topic_facet	Gravity waves Isotherms Meteorological balloons Thermal conductivity of gases Polytropic index measurement Meteorology balloon observation buoyancy heat balance helium hydrogen thermal conductivity
description	With the assumption of a polytropic evolution for the lifting gas, the response of an ascending open atmospheric balloon to a monochromatic gravity wave is specified among other parameters by the heat balance with the surrounding air. If one considers the bubble of gas inside the open balloon as a thermodynamic system in contact through the balloon skin with a uniform thermal source (isothermic atmosphere), a relationship between the skin thermal conductivity and the polytropic index for the lifting gas [hydrogen (H2) or helium (He)] may be found. The results for both gases are extended to the case of a typical tropospheric linearly decreasing temperature profile. Constant and variable balloon skin thicknesses are studied for both background temperature profiles. The polytropic index is found to be lower for the changing skin and shows a sensitive difference between the two temperature profiles. The relationship between the thermal conductivity and polytropic index becomes abrupt only when the latter approaches the isothermal or adiabatic values.
author	De La Torre, Alejandro Eduardo Alexander, Pedro M. Cornejo, Jorge Norberto
author_facet	De La Torre, Alejandro Eduardo Alexander, Pedro M. Cornejo, Jorge Norberto
author_sort	De La Torre, Alejandro Eduardo
title	A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon
title_short	A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon
title_full	A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon
title_fullStr	A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon
title_full_unstemmed	A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon
title_sort	relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon
publishDate	2003
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948763_v42_n2_p325_delaTorre http://hdl.handle.net/20.500.12110/paper_08948763_v42_n2_p325_delaTorre
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A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon

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