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Sensitivity Analysis Enquiry

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Old   August 14, 2017, 11:21
Default Sensitivity Analysis Enquiry
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Hi all,

I've stumbled upon a roadblock as i'm doing a sensitivity analysis for a study that I've previously done. My issue is that the sensitivity chart in the optimization process (under Response surface optimization) on ANSYS has produced negative values and i just wanted to know what it meant and how do i fix this so that it shows a positive effect.

What does a negative sensitivity mean and will it affect the results of my study?

Side note, the numbers of each decision variable also do not add up to 1 (as they should).

I've included some figures below so please have a look and let me know what you think. The colors represent different decision variables as labeled on the legend placed on the top right of the image. Flow uniformity, reattachment length and total pressure loss are the objective functions.

Thank you in advance!!
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