Numerical analysis of natural convection in enclosures with different form factor
DOI:
https://doi.org/10.5377/nexo.v24i1.589Keywords:
Natural convection, Closed cavity, ANSYSAbstract
In this work, numerical analysis was used to determine temperature distribution, density and both vertical as horizontal velocities applying engineering simulation software ANSYS. This was conduct for a closed cavity with geometrical relations height/width (H/E) of 0.5, 1 and 2. Likewise, constant temperatures in the left-right vertical walls of 50 and 20 °C and adiabatic boundary condition for the horizontal walls were considered. This activity was done considering Prandtl and Rayleigh numbers of 4.83 and 5.84x107, respectively. When results were compared for H/E = 2 and H/E = 1, it was found that the positive maximum value for the vertical velocity increased 26.29 %, horizontal velocity decreased 72.75 % and the central zone temperature in the cavity decreased 2.46 %. On the other hand, when the results for H/E = 0.5 and H/E = 1 were compared, it was found that the positive maximum value for the vertical velocity increased 7.24 %, horizontal velocity increased 34.08 % and the central zone temperature in the system decreased 3.70 %.
Keywords: Natural convection; Closed cavity; ANSYS
DOI: http://dx.doi.org/10.5377/nexo.v24i1.589
Nexo, Vol. 24, No. 1, pp. 3-10, 2011
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