Academic Journal
Dissipation instability of Couette-like adiabatic flows in a plane channel
| العنوان: | Dissipation instability of Couette-like adiabatic flows in a plane channel |
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| المؤلفون: | Barletta A., Celli M., Lazzari S., Vayssiere Brandão P. |
| المساهمون: | Barletta A., Celli M., Lazzari S., Vayssiere Brandão P. |
| سنة النشر: | 2023 |
| المجموعة: | IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
| مصطلحات موضوعية: | Viscous dissipation, Buoyancy force, Dual flow, Linear stability, Couette flow, Adiabatic walls |
| الوصف: | The mixed convection flow in a plane channel with adiabatic boundaries is examined. The boundaries have an externally prescribed relative velocity defining a Couette-like setup for the flow. A stationary flow regime is maintained with a constant velocity difference between the boundaries, considered as thermally insulated. The effect of viscous dissipation induces a heat source in the flow domain and, hence, a temperature gradient. The nonuniform temperature distribution causes, in turn, a buoyancy force and a combined forced and free flow regime. Dual mixed convection flows occur for a given velocity difference. Their structure is analysed where, in general, only one branch of the dual flows is compatible with the Oberbeck-Boussinesq approximation, for realistic values of the Gebhart number. A linear stability analysis of the basic stationary flows with viscous dissipation is carried out. The stability eigenvalue problem is solved numerically, leading to the determination of the neutral stability curves and the critical values of the Peclet number, for different Gebhart numbers. An analytical asymptotic solution in the special case of perturbations with infinite wavelength is also developed. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:001052398300001; volume:194; firstpage:1; lastpage:14; numberofpages:14; journal:INTERNATIONAL JOURNAL OF THERMAL SCIENCES; https://hdl.handle.net/11585/941360; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85166359292; https://www.sciencedirect.com/science/article/pii/S1290072923004325?via=ihub |
| DOI: | 10.1016/j.ijthermalsci.2023.108571 |
| الاتاحة: | https://hdl.handle.net/11585/941360 https://doi.org/10.1016/j.ijthermalsci.2023.108571 https://www.sciencedirect.com/science/article/pii/S1290072923004325?via=ihub |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.8328251E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.ijthermalsci.2023.108571 |
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