Simulation of natural convection in eccentric annulus: A combined Lattice Boltzmann and Smoothed profile approach
عنوان مقاله: Simulation of natural convection in eccentric annulus: A combined Lattice Boltzmann and Smoothed profile approach
شناسه ملی مقاله: ISME25_164
منتشر شده در بیست و پنجمین همایش سالانه مهندسی مکانیک در سال 1396
شناسه ملی مقاله: ISME25_164
منتشر شده در بیست و پنجمین همایش سالانه مهندسی مکانیک در سال 1396
مشخصات نویسندگان مقاله:
Samira Jafari - Student, Mechanical Engineering Department, Shahid Bahonar University of Kerman, Kerman, Iran
Mohammad Rahmnama - Professor, Petroleum Engineering Department, Shahid Bahonar University of Kerman, Kerman, Iran
Saeed Jafari - Associate Professor
خلاصه مقاله:
Samira Jafari - Student, Mechanical Engineering Department, Shahid Bahonar University of Kerman, Kerman, Iran
Mohammad Rahmnama - Professor, Petroleum Engineering Department, Shahid Bahonar University of Kerman, Kerman, Iran
Saeed Jafari - Associate Professor
In this paper a combination of lattice Boltzmann methodand smoothed profile method is applied to simulate naturalconvection heat transfer in horizontal eccentric annuals. Inthis approach, the fluid-solid interface has a thickness whichis comparable to grid spacing and it varies continuouslyfrom zero in fluid region to one in solid region. A twodimensional double distribution function lattice Boltzmannmethod is employed to simulate fluid flow and temperatureprofiles simultaneously. In order to implement the velocityand temperature boundary conditions, the force term andheat source/sink are included in the evolution equations.Since SPM employs fixed Eulerian nodes to implement allcalculations, the computational efficiency is improvedgreatly. The influence of vertical, horizontal and diagonaleccentricities at various positions is investigated. Isotherms,Streamlines and Nusselt numbers are given for each case.
کلمات کلیدی: Lattice Boltzmann method, Natural convection,Eccentricities, Smoothed profile method
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/634684/