Space with a font size 28 PREDICTIVE STUDY OF LAMINAR NATURAL CONVECTION IN SUPERCRITICAL FLUID ALONG VERTICAL FLAT PLATE Space with a font size 24 Space with a font size 12 Space with a font size 24 Space with a font size 24

Abbas Adil, Mohammed, Abdulwahab Saad, Razuqi
2017 Journal of Engineering and Sustainable Development   unpublished
The laminar natural convection in supercritical fluid along vertical flat plate with uniform heat flux was simulated in the present work. The governing equations of partial differential equations were solved numerically using the finite difference method. The thermo-physical properties calculation was based on a Van der Waals equation of state. The velocity and temperature profiles were solved with a FORTRAN code. Hydrofluorocarbons R134a, R1234yf and R404a were used as working fluids. Thermal
more » ... xpansivity at a reduced pressure and reduced temperature near critical point (Pr and Tr = 1.05, 1.1) showed sharp variation. The local Nusselt number as a function of the local Rayleigh number was plotted. The curve trend illustrates that the Nusselt number decreases as the reduced pressure and reduced temperature increases. The corresponding curves of supercritical conditions depict the same shape of the corresponding line of classic correlation. The velocity and temperature developing along the vertical plate was plotted and contour lines explained the fluid behavior above supercritical conditions. Space with a font size 6 Space with a font size 12 ‫عن‬ ‫تنبؤية‬ ‫دراسة‬ ‫الحمل‬ ‫الطبيعي‬ ‫عمودية‬ ‫صفيحة‬ ‫على‬ ‫الحرج‬ ‫فوق‬ ‫مائع‬ ‫داخل‬ ‫الطباقي‬ Space with a font size 12 :‫الخالصة‬ ‫فٍط‬ ‫تىجىد‬ ‫ػًىدٌح‬ ‫يسطحح‬ ‫نىحح‬ ‫غىل‬ ‫ػهى‬ ‫انحرجح‬ ‫انُقطح‬ ‫فىق‬ ‫نهسىائم‬ ً‫انطثٍؼ‬ ‫نهحًم‬ ‫يحاكاج‬ ‫اجراء‬ ً‫انحان‬ ‫انؼًم‬ ًٍ‫ٌرع‬ ‫انخصائص‬ ‫احرساب‬ ‫ذى‬ .‫انًحذودج‬ ‫انفروق‬ ‫غرٌقح‬ ‫تاسرخذاو‬ ‫ػذدٌا‬ ‫انجزئٍح‬ ‫انرفاظهٍح‬ ‫انًؼادالخ‬ ‫ذحكى‬ ً‫انر‬ ‫انًؼادالخ‬ ‫حم‬ ‫ذى‬ .‫ثاتد‬ ‫حراري‬ ‫ا‬ ‫حسة‬ ‫انحرارٌح‬ ‫انفٍزٌائٍح‬ ‫ترذايج‬ ‫تاسرخذاو‬ ‫انحرارج‬ ‫ودرجح‬ ‫انسرع‬ ‫اشكال‬ ‫حم‬ ‫ذى‬ .‫فال‬ ‫دٌر‬ ٌ‫تفا‬ ‫انخاصح‬ ‫نهغزاخ‬ ‫انؼايح‬ ‫نًؼادنح‬ FORTRAN ‫انهٍذروجٍٍُح‬ ‫انفهىرٌح‬ ‫انكرتىٍَح‬ ‫انًركثاخ‬ ‫اسرخذيد‬. R134a ‫و‬ ، R1234yf ‫و‬ R404a ‫يؼايم‬ ‫أظهر‬ .‫نهؼًم‬ ‫كًىائغ‬ ‫تانقرب‬ ‫انحرارج‬ ‫ودرجح‬ ‫انعغػ‬ ‫اَخفاض‬ ‫يؼايم‬ ‫نقٍى‬ ًً‫انحج‬ ‫انرًذد‬ (‫انحرجح‬ ‫انُقطح‬ ٍ‫ي‬ Pr and Tr = 1.05, 1.1 .‫انحاد‬ ‫اَحراف‬) ‫ذى‬ ً‫رٌه‬ ‫ورقى‬ ‫َسهد‬ ‫رقى‬ ٍٍ‫ت‬ ‫انؼالقح‬ ‫رسى‬. ‫االرذثاغ‬ ٍ‫ي‬ ‫انًقاتهح‬ ‫خػ‬ ٍ‫ي‬ ‫انشكم‬ ‫َفس‬ ‫ذصىر‬ ‫انحرجح‬ ‫فىق‬ ‫نهظروف‬ ‫انًقاتهح‬ ‫انًُحٍُاخ‬ ‫وخطىغ‬ ‫ػًىدٌح‬ ‫نىحح‬ ‫غىل‬ ‫ػهى‬ ‫انُايٍح‬ ‫انحرارج‬ ‫ودرجح‬ ‫سرػح‬ ‫رسى‬ ‫ذى‬ .ً‫انكالسٍك‬ ‫انرطىر‬ ‫ذ‬ ‫شرح‬ ‫ف‬ ‫انسىائم‬ ‫سهىك‬ ً ‫فىق‬ ‫انظروف‬ .‫انحرجح‬
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