Lecture 11 - Importing CAD Geometry-FloEFD的培训教程(三天)李.ppt

1、 .1Lecture 11 Basics about Importing CAD Geometry第1页，共12页。.2We need 3D solid geometry(not surface models,no sheet metals)Prefer the host format(i.e.prt for a ProE source)Prefer STEP(IGES is usually third order choice,except CATIA)Start simple!Remove irrelevant content beforehand!File ImportFile-Open

2、第2页，共12页。.3Step 1Start ImportMake sure under Options that Automatically Run Import Diagnostics(Healing)is selected.第3页，共12页。.4Take your example fileImport diagnostics starts automatically if chosen beforeAfter running import diagnostics the any errors or problems will be shownStep 2/1第4页，共12页。.5If n

3、ot a genuine Solid Works input-Fix the parts!Can no longer be moved accidentallyFloating on inputFixed after actionMultiple selection of all parts is recommendedStep 2/2第5页，共12页。.6 Do manual import diagnostics part by partRight click on part name-Open PartRight click-Imported Import Diagnostics Even

4、tually-Attempt to Heal All Close the part with Or Right click on part name-Open PartTools-Import DiagnosticsAttempt to Heal All Close the partStep 2/3第6页，共12页。.7 Check GeometryFlow Analysis-Tools-Check Geometry As EFD recognizes automatically fluids and solids,there is a function to check if this is

5、 done correctly.In addition there are sometimes problems with contacts between faces and edges or faces and points.If there are invalid contacts,their positions are shown in red in the modeling window if you select them in the list.If the reported fluid volume or the solid volume is zero,then inspec

6、t for repairStep 3/1第7页，共12页。.8 Features or parts that produce invalid contacts If you dont need these features or parts(for good results in a thermal simulation)supress them and no additional mesh will be generated and they dont produce invalid contacts anymore.If they are needed Step 3/2第8页，共12页。.

7、9Scale to enlarge from touching bodies into overlapping bodies.(no invalid contacts anymore)Open the part or edit the part in the assembly and choose from Insert-Features the feature Scale“.Set the value to e.g.1.001 so it will only slightly bigger but not influence the results.Step 3/3第9页，共12页。.10A

8、fter having repaired the invalid contacts they shouldnt appear anymore and the values for fluid and solid volume should be larger than zeroIf theres still no fluid volume found in the project,then perhaps there is no internal fluid volume,becauseThe default analysis type is internal andthe geometry

9、has only solid bodies without internal space in it so the program wont find any fluid body.In this case first set up an external flow project in the wizardand after having done this EFD should recognize also a fluid volume.Step 3/4第10页，共12页。.11Go through the EFD-Wizard and set up the EFD projectEven

10、tually start with Heat Conduction&Conduction on Solids,only,define a dummy heat source and look whether parts which should be in thermal contact are heated in common.Just do meshingThis was just a very shortened intro into CAD import!Trobleshooting can be done using the support line based on the files.Step 4第11页，共12页。.演讲完毕，谢谢观看！第12页，共12页。