5 Replies Latest reply on Sep 19, 2016 2:14 PM by David Paulson

# Is thre a way that the results in a cut plot (for example velocity) can be quantified to output the percentage of each gradient level.  For example velocity of 2-3 fpm is plotted green.....what is the % green on the plot?

Is there a way that the results in a cut plot (for example velocity) can be quantified to output the percentage of each gradient level.  For example, velocity of 2-3 fpm is plotted green.....what is the % green on the plot?

• ###### Re: Is thre a way that the results in a cut plot (for example velocity) can be quantified to output the percentage of each gradient level.  For example velocity of 2-3 fpm is plotted green.....what is the % green on the plot?

I don't think what you're asking for is possible. You might be able to do it with an image manipulation program, i.e. export your plot graphics to another program and get a histogram of the pixels. Might be easier to get your data that way if you stick to a monochrome white-to-black gradient colormap for your plot.

• ###### Re: Is thre a way that the results in a cut plot (for example velocity) can be quantified to output the percentage of each gradient level.  For example velocity of 2-3 fpm is plotted green.....what is the % green on the plot?

Thanks, Amit.  My VAR doesn't know how to do it either.  A typical cut plot for air flow velocity in a blast freezer: The air velocity through the product is very low (<2 fpm)whereas there is significant airflow bypassing the product at >20 fpm.  One can see that the airflow that is red represents at least 50% the mass flow of air in the system.  But I would like to output this as a numerical result.

• ###### Re: Is thre a way that the results in a cut plot (for example velocity) can be quantified to output the percentage of each gradient level.  For example velocity of 2-3 fpm is plotted green.....what is the % green on the plot?

You could put in some CAD solids and disable them in Flow Sim, then use the surfaces to calculate mass/volume flow rate of air. That will give you an estimation of how much air is actually doing any work here. HOWEVER since there is no physical barrier here (that I can see) it's not really a bypass and flow-through scenario, so the results won't be that accurate.

• ###### Re: Is thre a way that the results in a cut plot (for example velocity) can be quantified to output the percentage of each gradient level.  For example velocity of 2-3 fpm is plotted green.....what is the % green on the plot?

David, are you using "Reset to Plot Maximum " and "reset to Plot Minimum" option instead of "Reset to Global"? - Those icons appear in the right of the input of the Maximum and the Minimum Values of the plotted field variable in the "Setting" Panel of Plane Cut and Surface Plots.  It was my enhancement suggestion and it was implemented some years ago. This always help to see very clearly the distribution o the field variable in the plotted support (plane or surface).

• ###### Re: Is thre a way that the results in a cut plot (for example velocity) can be quantified to output the percentage of each gradient level.  For example velocity of 2-3 fpm is plotted green.....what is the % green on the plot?

Thanks for the response, Boyko.  I am aware of the reset plot options.  I would like to quantify each color as a % of the total graph area.  In the cut plot that I posted, the air going through the product is for the most part blue which is 0-2 fpm.  The area in red is > 20 fpm and does not provide any cooling of the product.  While my client underwtands the issue, I am not sure that they want to believe the magnititude of the issue.  Their basket design is wrong and they own thousands of them.

My next option is to analyze this as a thermal study which will take very long long CPU time.  To make it worse the product is shrimp (and water) in cardboard boxes.