Numerical investigation of the trapped modes in the presence of non-potential flow

Autor: Islam A. Ramadan, Congcong Ma, Mabrouk Ben Tahar

Publikováno v: The Journal of the Acoustical Society of America. 150(4)

A calculation method is proposed to investigate trapped modes in a rigid waveguide with rigid obstacles in the presence of non-potential steady mean flow in a two-dimensional coordinate system. This method facilitates the investigation of trapped mod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::131e5b1845ebb53e330ef36383ae1a10
https://pubmed.ncbi.nlm.nih.gov/34717451

EXTRACTION, PARTIAL PURIFICATION AND SOME FACTORS AFFECTING MILK CLOTTING ACTIVITY OF A MILK COAGULANT PREPARED FROM SUNFLOWER (Helianthus annus) SEEDS

Autor: E. M. Abd El-Wahed, A.A.Abdel Baky, Islam I. Ramadan, A.M. Rabie

Publikováno v: Zagazig Journal of Agricultural Research. 46:441-453

Crude extract of sunflower seeds was prepared using different extractants (distilledwater, 5% NaCl in distilled water, 5% NaCl in acetate buffer pH 5.0) and certain mixing ratios (1:2,1:5 and 1:10 seeds powder : extractant, respectively). Using of 5%

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c1ca45f1234336ea4ce54991d5529cf
https://doi.org/10.21608/zjar.2019.33399

Experimental and numerical investigation of natural convection flows in two horizontal thermoacoustic cavities

Autor: Catherine Weisman, Yann Fraigneau, Hélène Bailliet, Islam A. Ramadan, Diana Baltean-Carlès, Virginie Daru, Omar Hireche

Publikováno v: International Journal of Heat and Mass Transfer
International Journal of Heat and Mass Transfer, Elsevier, 2020, 149, pp.119195. ⟨10.1016/j.ijheatmasstransfer.2019.119195⟩

International audience; This study aims at exploring the potential generation of natural convective flows in thermoacoustic devices. To this effect, two thermoacoustic setups are considered without acoustic oscillations, each setup thus constituting

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a918821040b58492c4eb1eb8b2866775
https://hal.archives-ouvertes.fr/hal-02439053

Experimental investigation of the influence of natural convection and end-effects on Rayleigh streaming in a thermoacoustic engine

Autor: Jean-Christophe Valière, Hélène Bailliet, Islam A. Ramadan

Publikováno v: Journal of the Acoustical Society of America
Journal of the Acoustical Society of America, Acoustical Society of America, 2018, 143 (1), pp.361-372. ⟨10.1121/1.5021331⟩

International audience; The influence of both the natural convection and end-effects on Rayleigh streaming pattern in a simple standing-wave thermoacoustic engine is investigated experimentally at different acoustic levels. The axial mean velocity in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe6c911c766ffac0f7c238e50c74aa71
https://pubmed.ncbi.nlm.nih.gov/31255098

Effects of oxidizer flexibility and bluff-body blockage ratio on flammability limits of diffusion flames

Autor: Sherif S. Rashwan, Islam A. Ramadan, T. W. Abou-Arab, Mohamed A. Habib, Abdelmaged H. Ibrahim, Medhat A. Nemitallah

Publikováno v: Applied Energy
Applied Energy, Elsevier, 2016, 178, pp.19-28. ⟨10.1016/j.apenergy.2016.06.009⟩

Concerns about global warming have encouraged the interest in hydrocarbon combustion techniques that allow easy capture of carbon dioxide. One technique for achieving this objective is through the use of pure oxygen instead of air for combustion or w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8953465d0e909fe4b5b64070e0745803
https://hal.utc.fr/hal-03186017