تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
Effect of Variable Viscosity on Vortex Instability of Mixed Convection Boundary Layer Flow Adjacent to a Non-isothermal Horizontal Surface in a Porous Medium
Effect of Variable Viscosity on Vortex Instability of Mixed Convection Boundary Layer Flow Adjacent to a Non-isothermal Horizontal Surface in a Porous Medium
 
الموضوع : رياضيات 
لغة الوثيقة : الانجليزية 
المستخلص : In this paper, we study the effect of variable viscosity on the vortex instability of horizontal mixed convection boundary layer flow in a saturated porous medium with variable wall temperature. The variation of viscosity is expressed as an exponential function of temperature. The analysis of the disturbance flow is based on linear stability theory. The entire mixed convection regime is divided into two regions. The first region covers the forced convection dominated regime, which is characterized by the parameter ξf = Rax/Pex3/2 and the eigenvalue Peclet number. The second region covers the free convection dominated regime, which is characterized by the parameter ξn = Pex/Rax3/2 and the eigenvalue Rayleigh number. The two solutions provide results that cover the entire mixed-convection regime from pure-forced to pure-free convection. The local Nusselt number, critical Peclet and Rayleigh numbers and the associated wave numbers at the onset of vortex instability are presented over a wide range of wall to ambient viscosity ratio parameters μ* = μw/μ∞. The variable viscosity effect is found to enhance the heat transfer rate and destabilize the flow for liquid heating, while the opposite trend is true for gas heating. 
ردمد : 1319-8025 
اسم الدورية : Arabian Journal for Science and Engineering 
المجلد : 36 
العدد : 8 
سنة النشر : 1432 هـ
2011 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Monday, March 12, 2012 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
أحمد محمد عليوElaiw, Ahmed Mباحثدكتوراهa_m_elaiw@yahoo.com
F S IbrahimIbrahim, F Sباحثدكتوراه 
A A BakrBakr, A Aباحثدكتوراه 
A A SalamaSalama, A Aباحثدكتوراه 

الملفات

اسم الملفالنوعالوصف
 32627.pdf pdfAbstract

الرجوع إلى صفحة الأبحاث