Why after importing .shp files for microCFD 2D simulation the dimensions of the figure appears to be changed?

11 October 2020 1 3K Report

I am currently trying to do a microCFD simulation of a figure that has got some definite dimensions but after importing in the microCFD and then clicking on the modify shape option from the edit menu, the dimensions of the figure appears to be changed. Another interesting observation is that with differing tunnel lengths, the value of the dimensions appears to change. Why is this so and what are the possible solutions??

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