Wind turbine mesh wouldn't get smoother towards the blade's leading edge

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Last Post 17 December 2018

Hazem posted this 13 December 2018

I've been trying to make the mesh for this wind turbine blade as soft and less skewed as possible.

Before I start a solution I display the mesh on fluent (setup) and the leading edge looks oddly awful. I tried increasing the number of divisions in my mesh and updating a several times from 15 till 50 and no signs of improvement on fluent.

I wonder if what I'm doing is towards what I want or this is something else to be done. Please help

I've attached pics of fluent and the mesh, and If there are any other pics needed please inform me.

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kkanade posted this 14 December 2018

in image i can see that you have given sizing to two edges. its good. you will also need sizing leading edge of the turbine. if there is no edge, then please create it in spaceclaim or design modeler by splitting the blade face. following videos may help you for splitting face.

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Hazem posted this 14 December 2018

Thank you so much for caring to reply.

The picture I've attached shows the leading edge of the airfoil which is the cross section of my blade which consists of multiple planes of these lofted .I've used merge topology in Geometry and now I have one cross section at each end of the blade.

The 2 edges you have noticed are the leading edge selected in the picture and the corresponding one at the far end of the blade, I've given both of them the same edge sizing of 50.

Now if you mean that I should split the leading edge. This will not be any help because it will make a highly curved part discontinuous and will make the solution bad.

If you meant another thing please clarify it or suggest me another thing. Thank you sir!

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kkanade posted this 14 December 2018

please check image below. i am talking about leading edge as selected in image below.

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Hazem posted this 14 December 2018

What I meant by the leading edge is the edge shown below down there.
While the edge you mention in your picture up there means that I'll be splitting my leading edge to two parts. this might work for "Meshing" only as it will improve the divisions in it.

But Solving that will give wrong outputs because in a highly curved area, one curve only should be drawn for it. if you split it to two curves it will create discontinuity.

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kkanade posted this 17 December 2018

for any curved surface or edge, if you want to resolve it, you will need fine mesh. also you will have to split the face as i showed at leading edge. it will ensure that curvature is maintained during meshing.

spliting side curve into two curves will not give any problem in mesh as well in solver.