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Is the position of "means" in the following sentence correct grammatically? If it is not , kindly suggest ways to make it clearer.

In addition, the increase of entropy generation around the CTB and along the CTB length at Fi=0.275 means that there is a stronger turbulent interaction between the TLV and the mainstream around the CTB’s suction surface than the VTB’s suction surface.

CTB=Constant thickness blade
VTB=Variablethickness blade
Fi=flow coefficient
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I believe the use of means is grammatically correct here.

Your sentence can basically be broken down into The increase in X means Y, which is correct, so despite X and Y both being pretty long phrases, the sentence remains grammatically correct.

That said, the sentence is a bit of a mouthful. One way it can be simplified is by replacing the phrase "means that there is" with "indicates."

In addition, the increase of entropy generation around the CTB and along the CTB length at Fi=0.275 indicates a stronger turbulent interaction between the TLV and the mainstream around the CTB’s suction surface than the VTB’s suction surface.

The other opportunity for clarification in this sentence is with the phrase "...than VTB's suction surface." I had to read this sentence several times because that part confused me.

You seem to set up a contrast between two interactions, so I was expecting a set up of stronger...between X and Y than [between] A and B. But to me, if

  • X = the TLV
  • Y = the mainstream around the CTB's suction surface
  • A = the VTB's suction surface

then you end up with a construction that sounds like stronger...between X and Y than [between] A – but where's B?

But eventually it occurred to me that maybe you're contrasting the interactions around the two suction surfaces. If that's indeed the case, inserting "around" before "the VTB's suction surface" would help tremendously in clearing things up:

In addition, the increase of entropy generation around the CTB and along the CTB length at Fi=0.275 indicates a stronger turbulent interaction between the TLV and the mainstream around the CTB’s suction surface than around the VTB’s suction surface.

With that addition, your sentence is basically shorthand for "...indicates a stronger turbulent interaction between the TLV and the mainstream around the CTB's suction surface than between the TLV and the mainstream around the VTB's suction surface."

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