How to mesh doble pipe heat exchanger with twisted tape insert??

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  • Last Post 26 December 2019
Devank12 posted this 05 June 2019

I am doing flow analysis in double pipe heat exchanger using fluent. Here twisted tape is located inside the internal pipe . I successfully created the geometry using design modular. I am currently facing some trouble on meshing operations. Can anyone tell me what type of mesh is very effective this kind of heat exchanger???

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rwoolhou posted this 05 June 2019

Please can you post some images? By twisted tape do you mean a helical baffle? 

Devank12 posted this 05 June 2019

i have enclosed the fig of the front view of the heat exchanger and twisted tape inside the fluid domin 

rwoolhou posted this 05 June 2019

OK, thanks. I'd split the centre channel with the baffle (I assume it's attached to the inner tube) and sweep.  Looking at the upper image: you need to have mesh in the solid zone(s) or there will be no heat transfer. 

singh33 posted this 21 December 2019

Can you please elaborate further more I am working on same problem and uses tetrahedron mesh after all my efforts to generate a hexa mesh goes into vain which results in increase simulation time , can we generate structured mesh in 2m long and 0.02m diameter pipe.

and if yes please give some guidance too.

Thanks in advance 

peteroznewman posted this 21 December 2019

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singh33 posted this 26 December 2019

Dear peteroznewman, thanks for the lecture I section the pipe into 3 domain of 0.7m each and body become sweepable but as I generate mesh it results in The error says "the meshing has completed, but some elements are not compliant with the applied shape checking criteria" can you give your valuable suggestion on this.

 

Thanks in advance 

peteroznewman posted this 26 December 2019

Is it an error or a warning? Look at the Mesh Quality metrics to see if the element shapes are acceptable.

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