TY  - EJOU
AU  - Mohammed, Kafel Azeez 
AU  - Saleem, Ahmed Mustaffa 

TI  - NUMERICAL INVESTIGATION OF NUSSELT NUMBER FOR  NANOFLUIDS FLOW IN AN INCLINED CYLINDER
T2  - Frontiers in Heat and Mass Transfer

PY  - 2021
VL  - 16
IS  - 1
SN  - 2151-8629

AB  - Numerical investigation is performed for the determination of Nusselt number of ZnO, TiO<sub>2</sub> and SiO<sub>2</sub> nanoparticles dispersed in 60% ethylene glycol 
and 40% water inside inclined cylinder for adiabatic and isothermal process. The present study was conducted for both the constant heat flux (10,000 
W/m<sup>2</sup>) and constant wall temperature (313.15 K) boundary conditions. At the inlet, the uniform axial velocity and initial temperature (293 K) were 
assumed. The results show the change of average Nusselt number at Reynolds number (400), Rayleigh number (10<sup>6</sup>) and volume fraction percentage 
(2%). From results for adiabatic process when increasing the slop up to (45o), the Nusselt number augments, while Nusselt number is reduced by 
further tube inclination. As it is clearly seen, the highest value of Nusselt number is corresponded to (45o) and for isothermal process it is shown that 
the value of Nusselt number in horizontal position is higher than the vertical position. The values of Nusselt number ratio were evaluated to be (45%, 
31%, 25%) for the three Nano fluids (ZnO, TiO<sub>2</sub> and SiO<sub>2</sub>) respectively, with the insulation (adiabatic) and (36%, 27%, 22%) without insulation 
(isothermal).
KW  - <i>concentration nanofluids
KW  -  ethylene glycol
KW  -  nanofluids
KW  -  nanoparticles
KW  -  thermal conductivity</i>

DO  - 10.5098/hmt.16.20