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[snappyHexMesh] Invalid Normals for source face to target face while making AMI?

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Old   November 22, 2019, 00:58
Default Invalid Normals for source face to target face while making AMI?
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Saurabh Das
Join Date: Jul 2018
Posts: 43
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I was making a stirrer simulation with pimpleDyMFoam. I made AMIs for simulating the moving mesh. While executing the paraFoam command after making the mesh and patching it, I found the following error message on my console.

Code:
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 177 points 4((-0.0796114 0.155 4.82332e-10) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 0.00243401) (-0.0796045 0.155 0.00231293)) target face 6171 points 4((-0.0769933 0.155 8.00093e-11) (-0.0748773 0.155 2.39736e-11) (-0.0748734 0.155 0.00250567) (-0.0770568 0.155 0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 177 points 4((-0.0796114 0.155 4.82332e-10) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 0.00243401) (-0.0796045 0.155 0.00231293)) target face 3083 points 4((-0.0769933 0.155 8.00093e-11) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 -0.00243401) (-0.0770568 0.155 -0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 177 points 4((-0.0796114 0.155 4.82332e-10) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 0.00243401) (-0.0796045 0.155 0.00231293)) target face 1623 points 4((-0.0786529 0.155 0.00243401) (-0.0785225 0.155 2.15921e-10) (-0.0769933 0.155 8.00093e-11) (-0.0770568 0.155 0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 6171 points 4((-0.0769933 0.155 8.00093e-11) (-0.0748773 0.155 2.39736e-11) (-0.0748734 0.155 0.00250567) (-0.0770568 0.155 0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 3083 points 4((-0.0769933 0.155 8.00093e-11) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 -0.00243401) (-0.0770568 0.155 -0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 1623 points 4((-0.0786529 0.155 0.00243401) (-0.0785225 0.155 2.15921e-10) (-0.0769933 0.155 8.00093e-11) (-0.0770568 0.155 0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 6731 points 4((4.82333e-10 0.155 0.0796114) (2.15926e-10 0.155 0.0785225) (0.00243401 0.155 0.0786529) (0.00231293 0.155 0.0796045)) target face 7917 points 4((0.00250567 0.155 0.0748734) (0.00252271 0.155 0.0770568) (8.00166e-11 0.155 0.0769933) (2.39806e-11 0.155 0.0748773))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 6731 points 4((4.82333e-10 0.155 0.0796114) (2.15926e-10 0.155 0.0785225) (0.00243401 0.155 0.0786529) (0.00231293 0.155 0.0796045)) target face 3581 points 4((8.00166e-11 0.155 0.0769933) (2.15926e-10 0.155 0.0785225) (-0.00243401 0.155 0.0786529) (-0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 6731 points 4((4.82333e-10 0.155 0.0796114) (2.15926e-10 0.155 0.0785225) (0.00243401 0.155 0.0786529) (0.00231293 0.155 0.0796045)) target face 3589 points 4((0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225) (8.00166e-11 0.155 0.0769933) (0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 7917 points 4((0.00250567 0.155 0.0748734) (0.00252271 0.155 0.0770568) (8.00166e-11 0.155 0.0769933) (2.39806e-11 0.155 0.0748773))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 3581 points 4((8.00166e-11 0.155 0.0769933) (2.15926e-10 0.155 0.0785225) (-0.00243401 0.155 0.0786529) (-0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 3589 points 4((0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225) (8.00166e-11 0.155 0.0769933) (0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 7284 points 4((-0.0748734 0.155 -0.00250567) (-0.0748773 0.155 2.39736e-11) (-0.0769933 0.155 8.00093e-11) (-0.0770568 0.155 -0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 1623 points 4((-0.0786529 0.155 0.00243401) (-0.0785225 0.155 2.15921e-10) (-0.0769933 0.155 8.00093e-11) (-0.0770568 0.155 0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 3083 points 4((-0.0769933 0.155 8.00093e-11) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 -0.00243401) (-0.0770568 0.155 -0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 7901 points 4((8.00166e-11 0.155 0.0769933) (-0.00252271 0.155 0.0770568) (-0.00250567 0.155 0.0748734) (2.39806e-11 0.155 0.0748773))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 3589 points 4((0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225) (8.00166e-11 0.155 0.0769933) (0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 3581 points 4((8.00166e-11 0.155 0.0769933) (2.15926e-10 0.155 0.0785225) (-0.00243401 0.155 0.0786529) (-0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 177 points 4((-0.0796114 0.155 4.82332e-10) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 0.00243401) (-0.0796045 0.155 0.00231293)) target face 6171 points 4((-0.0769933 0.155 8.00093e-11) (-0.0748773 0.155 2.39736e-11) (-0.0748734 0.155 0.00250567) (-0.0770568 0.155 0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 177 points 4((-0.0796114 0.155 4.82332e-10) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 0.00243401) (-0.0796045 0.155 0.00231293)) target face 3083 points 4((-0.0769933 0.155 8.00093e-11) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 -0.00243401) (-0.0770568 0.155 -0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 177 points 4((-0.0796114 0.155 4.82332e-10) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 0.00243401) (-0.0796045 0.155 0.00231293)) target face 1623 points 4((-0.0786529 0.155 0.00243401) (-0.0785225 0.155 2.15921e-10) (-0.0769933 0.155 8.00093e-11) (-0.0770568 0.155 0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 7901 points 4((8.00166e-11 0.155 0.0769933) (-0.00252271 0.155 0.0770568) (-0.00250567 0.155 0.0748734) (2.39806e-11 0.155 0.0748773))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 3589 points 4((0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225) (8.00166e-11 0.155 0.0769933) (0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 9159 points 4((4.82333e-10 0.155 0.0796114) (-0.00231293 0.155 0.0796045) (-0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225)) target face 3581 points 4((8.00166e-11 0.155 0.0769933) (2.15926e-10 0.155 0.0785225) (-0.00243401 0.155 0.0786529) (-0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 6731 points 4((4.82333e-10 0.155 0.0796114) (2.15926e-10 0.155 0.0785225) (0.00243401 0.155 0.0786529) (0.00231293 0.155 0.0796045)) target face 7917 points 4((0.00250567 0.155 0.0748734) (0.00252271 0.155 0.0770568) (8.00166e-11 0.155 0.0769933) (2.39806e-11 0.155 0.0748773))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 6731 points 4((4.82333e-10 0.155 0.0796114) (2.15926e-10 0.155 0.0785225) (0.00243401 0.155 0.0786529) (0.00231293 0.155 0.0796045)) target face 3581 points 4((8.00166e-11 0.155 0.0769933) (2.15926e-10 0.155 0.0785225) (-0.00243401 0.155 0.0786529) (-0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 6731 points 4((4.82333e-10 0.155 0.0796114) (2.15926e-10 0.155 0.0785225) (0.00243401 0.155 0.0786529) (0.00231293 0.155 0.0796045)) target face 3589 points 4((0.00243401 0.155 0.0786529) (2.15926e-10 0.155 0.0785225) (8.00166e-11 0.155 0.0769933) (0.00252271 0.155 0.0770568))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 7284 points 4((-0.0748734 0.155 -0.00250567) (-0.0748773 0.155 2.39736e-11) (-0.0769933 0.155 8.00093e-11) (-0.0770568 0.155 -0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 1623 points 4((-0.0786529 0.155 0.00243401) (-0.0785225 0.155 2.15921e-10) (-0.0769933 0.155 8.00093e-11) (-0.0770568 0.155 0.00252271))
--> FOAM Warning : 
    From function void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea(const label, const label) const
    in file lnInclude/faceAreaWeightAMI.C at line 359
    Invalid normal for source face 8024 points 4((-0.0796114 0.155 4.82332e-10) (-0.0796045 0.155 -0.00231293) (-0.0786529 0.155 -0.00243401) (-0.0785225 0.155 2.15921e-10)) target face 3083 points 4((-0.0769933 0.155 8.00093e-11) (-0.0785225 0.155 2.15921e-10) (-0.0786529 0.155 -0.00243401) (-0.0770568 0.155 -0.00252271))
On checking the source code faceAreaWeightAMI.c , I found out that this message appears when the magnitude of the vector indicating the normal of a particular face is less than ROOTVMSMALL( A constant with a value 1e-18). But beyond that I dont know much.

Could anyone please help me out with this? If this information is not enough, please notify me.
Sorabh is offline   Reply With Quote

Old   August 3, 2021, 07:35
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Dear Saurabh,
Could you manage to solve this problem?
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