Abstract
The present work examines utilizing CFD simulation of the natural convection within complex enclosure with four different cases of wavy patterns considering the existence of inner heated elliptical body. The influence of inclined magnetic field had been taken into consideration. The space between the inner body and the enclosure had been filled by two layers. The first right layer was filled by nanofluid while the second left layer had been filled by porous medium with the same nanofluid. The influence of various parameters such as number of undulations, the distance between the wavy walls, and the inner elliptical body position for four different cases of wavy walls patterns with and without magnetic field on fluid flow and heat transfer had been drawn in terms of streamlines, isotherms and Nusselt number. The results indicate that in the absence of magnetic field the Case 3 has the highest stream function with a dimensionless value of
Ψ
max
=
34.229
which make Case 3 is recommended wavy patterns for bettering the fluid flow strength when the number of undulations kept at
(
N
=
1
)
and the distance between the wavy walls kept at
B
=
0.8
. It is important to note that at
B
=
0.8
, Case 1 has the lowest strength of the fluid flow while it enhanced by 41.17% when
B
=
1.0
. On the other hand, increasing the distance between wavy walls from
(
B
=
0.8
)
into
(
B
=
1.4
)
enhances Nusselt number by 31.67%. The influence of inner body position had the highest impact of heat transfer rate in a comparison with the other as it helps in improvement of Nusselt number by 67.70% when it moves toward to bottom of the enclosure. Generally, the magnetic field reduces both of the fluid flow intensity and heat transfer for all of the shape of wavy patterns.