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#21 |
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Pietro Loporcaro
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Understood. Then, having just the numbers of particles in inlet and outlet, how do you suggest to calculate the grade efficiency curve? and so having the efficiency of my cyclone in function of the particle size?
I.e. shall i calculate the separation efficiency for 3e-06 m particle like this: number of escaped particle/ number of injected particle? |
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#22 |
Senior Member
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Taking just the ratio of numbers would give an idea but not correct value. This would be correct if and only if all particles are of same size and each parcel is representing same number of particles. A better approach would be to look at the mass of particles. Take the ratio of particle mass at outlet to particle mass at inlet.
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Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority. |
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#23 |
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That was what i was thinking about but the only thing that i've been able to visualize is the mass flow rate in inlet and outlet, (in kg/s) , and i don't know how to have information about the mass fraction in relation with the particle's size. how can i get this information?
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#24 |
Senior Member
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Mass flow is for continuous phase. For the particles, it is all included in the sample file. Open the sample files in the text editor you use, vi, or textpad or notepad++, or any other. Or you may directly load those in Gnuplot or Excel.
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#25 |
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Pietro Loporcaro
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just opened one of the .dpm file and i can see all the particles in that section and all these proprieties:
(x y z u v w diameter t mass-flow mass frequency time name) Now, for example, for the 3e-06 particles, should I calculate the mass of all these particles in inlet , and then the mass of all these particles in the out_dust and then i can calculate the mass fraction? |
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#26 |
Senior Member
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mass-flow shows the mass flow represented by that particular parcel or injection whereas mass is the mass of individual particle. frequency is their ratio. So, you can add mass-flow for all the rows for outlet as well as inlet and then take their ratio.
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#27 |
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well doing like this i will obtain the overall efficiency. if you can suggest me how to obtain a distribution like this (in the images attached), in order to plot the curve in the second image. Immagine.png
Immagine2.png |
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#28 |
Senior Member
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The sample file also has diameter given. Just sum the values for given diameters only. That will give you as many number as many diameters you have.
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Tags |
cyclone separator, grade efficiency curve |
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