Frequency Power Spectra of Global Quantities in Unsteady Magnetoconvection
We present the results of direct numerical simulations of power spectral densities for kinetic energy, convective entropy, and heat flux for unsteady Rayleigh–Bénard magnetoconvection in the frequency space. For larger values of frequency, the power spectral densities for all the global quantities v...
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MDPI AG
2021-04-01
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| Series: | Fluids |
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| Online Access: | https://www.mdpi.com/2311-5521/6/4/163 |
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| author | Sandip Das Krishna Kumar |
| author_facet | Sandip Das Krishna Kumar |
| author_sort | Sandip Das |
| collection | DOAJ |
| description | We present the results of direct numerical simulations of power spectral densities for kinetic energy, convective entropy, and heat flux for unsteady Rayleigh–Bénard magnetoconvection in the frequency space. For larger values of frequency, the power spectral densities for all the global quantities vary with frequency (<i>f</i>) as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>f</mi><mrow><mo>−</mo><mn>2</mn></mrow></msup></semantics></math></inline-formula>. The scaling exponent is independent of Rayleigh number, Chandrasekhar’s number, and thermal Prandtl number. |
| first_indexed | 2024-03-10T12:11:42Z |
| format | Article |
| id | doaj.art-99d37fa230064b61bcd24489b57994b9 |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T12:11:42Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-99d37fa230064b61bcd24489b57994b92023-11-21T16:08:30ZengMDPI AGFluids2311-55212021-04-016416310.3390/fluids6040163Frequency Power Spectra of Global Quantities in Unsteady MagnetoconvectionSandip Das0Krishna Kumar1Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, IndiaDepartment of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, IndiaWe present the results of direct numerical simulations of power spectral densities for kinetic energy, convective entropy, and heat flux for unsteady Rayleigh–Bénard magnetoconvection in the frequency space. For larger values of frequency, the power spectral densities for all the global quantities vary with frequency (<i>f</i>) as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>f</mi><mrow><mo>−</mo><mn>2</mn></mrow></msup></semantics></math></inline-formula>. The scaling exponent is independent of Rayleigh number, Chandrasekhar’s number, and thermal Prandtl number.https://www.mdpi.com/2311-5521/6/4/163magnetoconvectionturbulent flowpower spectral densities (PSD) |
| spellingShingle | Sandip Das Krishna Kumar Frequency Power Spectra of Global Quantities in Unsteady Magnetoconvection Fluids magnetoconvection turbulent flow power spectral densities (PSD) |
| title | Frequency Power Spectra of Global Quantities in Unsteady Magnetoconvection |
| title_full | Frequency Power Spectra of Global Quantities in Unsteady Magnetoconvection |
| title_fullStr | Frequency Power Spectra of Global Quantities in Unsteady Magnetoconvection |
| title_full_unstemmed | Frequency Power Spectra of Global Quantities in Unsteady Magnetoconvection |
| title_short | Frequency Power Spectra of Global Quantities in Unsteady Magnetoconvection |
| title_sort | frequency power spectra of global quantities in unsteady magnetoconvection |
| topic | magnetoconvection turbulent flow power spectral densities (PSD) |
| url | https://www.mdpi.com/2311-5521/6/4/163 |
| work_keys_str_mv | AT sandipdas frequencypowerspectraofglobalquantitiesinunsteadymagnetoconvection AT krishnakumar frequencypowerspectraofglobalquantitiesinunsteadymagnetoconvection |