March 9, 2021 at 10:16 amneal312000Subscriber
I have subtracted fan blades from fan case using Boolean. I used body sizing of 2mm but still mesh around the edges of the fan blades and on the surface of the fan case has a skewness of greater than 0.95 and orthogonality of less than 0.01. I am trying to simulate the working of hot end in a 3D printer. But with this quality of mesh I am not able to simulate how the cooling fan will cool the hot end in ansys fluent.
Size of fan case is 28mm in diameter and 8.27 in thickness. I have attached the bad mesh and the whole fan case picture for referenceMarch 9, 2021 at 11:22 amKeyur KanadeAnsys EmployeePlease give sizing to faces of thickness of the blades. Use size = thickness of blades. nPlease check following videosnnAnsys Meshing Sizing:nRegards,nKeyurnHow to access Ansys Online Help DocumentnHow to show full resolution imagenGuidelines on the Student CommunitynHow to use Google to search within Ansys Student CommunitynnMarch 10, 2021 at 11:00 amneal312000SubscriberI have applied size equal to 0.11mm which is the size of the thickness of blade. I have used proximity and curvature in advanced sizing function. But still the skewness is more than 0.95nMarch 10, 2021 at 11:01 amneal312000SubscriberI have given the sizing to faces of thickness of the blade to 0.11mmnMarch 10, 2021 at 11:53 amRobAnsys EmployeeHow close is the fan to the surrounding volume? If the gap is small you'll need to significantly reduce the cell size. nMarch 11, 2021 at 7:20 amneal312000SubscriberThe fluid domain is 25 mm aways from the fan. The fan case is 1 mm away from the fan blades. I am using a cylindrical fluid domain. Decreasing the elements size less than 0.11mm isn't possible due to the computational power of cpu. Time taken to mesh the model is too long.nMarch 11, 2021 at 7:45 amneal312000SubscriberThank you rob , my fan case surface was 0.01mm from the fan blades which was causing the mesh to be skewed.nMarch 11, 2021 at 11:52 amRobAnsys EmployeeYou're welcome. You'll need to fix the skew and resolve the blades (and rest of the domain) otherwise the results won't be much use. nViewing 7 reply threads
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