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An analytical estimate of the energy dissipation rate in the dissipation cell can be obtained. Use the following equations: Include Page AGUACLARA:GequalrootepsilonovernuAGUACLARA: Gequalrootepsilonovernu Include Page AGUACLARA:epsilonCpVsquaredover2thetaAGUACLARA: epsilonCpVsquaredover2theta Include Page AGUACLARA:epsiloncellAGUACLARA: epsiloncell
Using the equation above to estimate the energy dissipation rate in the expansion zone we obtain an average value of ??. This is based on the assumption that the length of the dissipation region is approximately twice (Π cell = 2) the distance between the baffles.
Calculate the value of Gθ for each cell in the computational grid and sum this up over the domain containing the dissipation zone to get a more accurate measure of the actual Gθ for a 180 degree bend. Compare that with the estimate that the AguaClara team is currently using.Include Page AGUACLARA:GthetacellAGUACLARA: Gthetacell
Figure 10. Wall Yplus
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