forced convection heat transfer from a circular cylinder embedded in ...

Variation of Nu in porous medium
using porous media for heat transfer
Nu/Pe^.5
14.4
14.2
14
13.8
13.6
q''=2.53 kw/m^2
q''=2.12 kw/m^2
q''=1.86 kw/m^2
q''=1.53 kw/m^2
q''=1.27 kw/m^2
problems is emphasized.
3.50
Comparison of Nu for both heat transfer in porous
medium and in a clear flow
13.4
3.00
13.2
2.50
13
1200 1610 1810
Re
Nu/pe^.5
2.00
1.50
1.00
With porous
Clear flow
Figure 3:
and heat fluxes
For the clear fluid
for various Reynolds
versus
Reynolds number is presented in figure 4.
In this case the results show conformity
with the similarity solution. That is, the
relation
exists in the clear fluid [2].
Figure 4: versus Reynolds
number in clear fluid.
0.50
0.00
Figure 5: Comparison of Nusselt number
for heat transfer in porous media and clear
fluid.
4. Conclusions
The steady state forced convection heat
transfer around the cylindrical heater
embedded in the porous media was
examined experimentally. The results
compared with the clear fluid case shows
that the porous media enhances the heat
transfer rate. The value of
porous media increases by increasing the
heat fluxes and it remains approximately
constant by increasing the Reynolds
number.
1200 1610 1800
Re
in
The comparison of Nusselt number is
plotted in figure 5. It is evident that porous
media enhance the heat transfer from the
embedded cylinder. Thus the superiority of
5