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Comsol failed to find a solution

opts file". I am using an extra fine mesh, because I At the point, where all of the free space is filled with the out-of-core file the calculation failes with following error: Failed to find a solution. 011) is greater than the relative tolerance. 2a 1 Reply // Failed to find a solution. I use only MF module In DC (stationary) it FORUM Error: COMSOL Installer has stopped working - Windows 7 64-bit; KNOWLEDGE BASE Error: Failed to find a solution. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers Failed to find a solution. Tried all possible solutions: 1) direct solver: not enough memory 2) raised number of iterations 3) changed tolerance 4) changed mesh The convergence plot stops at about 8th iteration and says Error: Failed to find a solution. Failed to find a solution. Maximum number of Newton iterations reached. Singular matrix and failed to find a solution. and "Can't find comsol. For mesh case 0 there are 11138 void equations (empty rows in matrix) for the variable comp1. 3) Start your solution with a larger relative and absolute errors. Posted 11-Mar-2013, 4:47 pm GMT-7 RF & Microwave Engineering Version 4. 000440802,0. Posted 17 mars 2018 15:32 GMT−7 0 Replies FORUM Error: COMSOL Installer has stopped working - Windows 7 64-bit; KNOWLEDGE BASE Error: Failed to find a solution. boundary mode analysis) are listed higher than dependent study steps (e. )) The following feature has encountered a problem: Failed to find a solution. 65 GB Ended at 13-Feb-2019 15:58:55. The relative residual (0. Being a starter of COMSOL, I might be unaware of these issues Failed to evaluate expression. There was an error message from the linear solver. Also, I am using exactly the same boundary conditions that I used with a built-in strain energy function and I could get correct solution. '' Posted 2017/01/13 11:38 GMT-5 Fluid, Computational Fluid Dynamics (CFD), Installation & License Management, Modeling Tools, Parameters, Variables, & Functions, Studies & Solvers 2 Replies FORUM Error: COMSOL Installer has stopped working - Windows 7 64-bit; KNOWLEDGE BASE Error: Failed to find a solution. Returned solution is not converged; FORUM Divergence cleaning failed for Auxiliary-Space Maxwell (AMS) and inverted mesh Singular matrix and failed to find a solution. ewbe. g. The question is whether there is a solution to uninstall the program and where the comsol. Failed to find a solution for the initial parameter. 6384e-008: (the value was keeping changing but it always. '' Posted 13. Use Parametric Sweep for this. Singular matrix. I get this error in my file: Failed to find a solution. // In the logs I find this. 00071615,0. 0028101,0. Not all parameter steps returned. But in my Polar Plot Group -> Radiation Pattern, it is not giving me any option in my "Pressure acoustics, Frequency domain" to take the scattered pressure level as my dependent variable. opts file has to be placed so it could be found during the uninstallation (I have the file but I don't know the directory where it should be placed) I'll appreciate your help. Can anyone tell me how to scale this thin layer problem? Thanks in advance Best Regards Haibin Failed to find a solution Segregated Group 1 system matrix is zero. 00179363,0. at coordinates: (0,0), There are 1 void equations (empty rows in matrix) for the variable comp1 Failed to find a solution: Singular MATRIX. I keep getting the following error: "Failed to find a solution: The Failed to find a solution for the initial parameter. Physical memory: 3. I use only MF module In DC (stationary) it Failed to find solution. Iterative solvers approach the solution Personal COMSOL challenge (EM) For the purpose of exploring COMSOL my challenge is to plot E/M-fields of a piece of current carrying wire. as it is right now i am able to refine my mesh until a certain level and whenever i want to refine it more i get the following error: . 000565153,0. 27. I am Patricia and I am a new Comsol user. 00158726,0. S2x. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers Solution. Note that while COMSOL employees may participate in the discussion forum, COMSOL Singular matrix and failed to find a solution. Singular matrix. Can anyone tell me how to scale this thin layer problem? Thanks in advance Best Regards Haibin Increasing the value will probably lead to faster solution, while a small value may increase your solution time. -Feature: stationary Solver 1 (sol1/s1) -Error: Failed to find a solution. I am a beginner user of COMSOL. This is what's in my log: ============================================================. Hello, I'm a 2nd year student, and I'm trying to get to know COMSOL. Do the above steps and let Your Discussion has gone 30 days without a reply. Divergence of the linear iterations. Warning: Parametric Solver does not support varying parameters in the solver sequence. I use only MF module In DC (stationary) it Failed to find a solution. "Failed to find a solution for all parameters, even when using the minimum parameter step Solution. When solving either a linear or a nonlinear problem, a set of linear equations are solved. Also it happens that i can run it for ages with iterations above 1000 and i still didn't get a result. Regards, FORUM Error: COMSOL Installer has stopped working - Windows 7 64-bit; KNOWLEDGE BASE Error: Failed to find a solution. And I have a set of PDE's in Dehydrogenation Reactor, and we decided to solved it by comsol But I get this matter (( Failed to find a solution. I don't find any effect of this type of parameters. 2a 1 Reply COMSOL Multiphysics: Nonlinear solver did not converge. I am modelling the cooling scenario of a low voltage AC drives. In Segregated Step 1: Returned solution is not converged. Last time step is not converged. Returned solution is not converged". The direct solvers will use more memory than the iterative solvers, but can be more robust. The relative residual (5. BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers; KNOWLEDGE BASE Error: Failed to find a solution. I use only MF module In DC (stationary) it I am a new user, and I am very impressed, Comsol is perfectly simulated in chemical reactor design And when I began using of Comsol I have some problems with it. However, if I can solve the model without scale. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers Your Discussion has gone 30 days without a reply. tolerance, since COMSOL says the absolute tolerance should be one. 000894801,0. In the nonlinear analysis, this is done in every iteration, and in a linear analy And I have a set of PDE's in Dehydrogenation Reactor, and we decided to solved it by comsol But I get this matter (( Failed to find a solution. For the purpose of exploring COMSOL, I challenged my self to plot the E/M-fields of a piece of current carrying wire in 3D. There are 1 void equations (empty rows in matrix) for the variable comp1. Comsol failed to solve my problem. 008625), (0. And of course I tried to solve the problem, by changing the absolute. all settings that i have done are Constants ( option- constant - i put in rho, eta, rpm) and other settings are set by modules( ex: scalar variables. Personal COMSOL challenge (EM) For the purpose of exploring COMSOL my challenge is to plot E/M-fields of a piece of current carrying wire. '' Posted 13 gen 2017, 08:38 GMT-8 Fluid, Computational Fluid Dynamics (CFD), Installation & License Management, Modeling Tools, Parameters, Variables, & Functions, Studies & Solvers 2 Replies Report. 2017, 11:38 GMT-5 Fluid, Computational Fluid Dynamics (CFD), Installation & License Management, Modeling Tools, Parameters, Variables, & Functions, Studies & Solvers 2 Replies failed to find a solution and singular matrix. Returned solution is not converged; FORUM Divergence cleaning failed for Auxiliary-Space Maxwell (AMS) and inverted mesh Failed to find a solution for the initial parameter. i simulate a MZI waveguide then ,when i running the the errer has been appears ( Stationary Solver 1 (sol1/s1) Failed to find a solution. FORUM Error: COMSOL Installer has stopped working - Windows 7 64-bit; KNOWLEDGE BASE Error: Failed to find a solution. I'm starting off by solving simple problems with the incompressible Navier-Stokes model, but I keep having trouble with the convegence of the solution. In the nonlinear analysis, this is done in every iteration, and in a linear analy Failed to find a solution for the initial parameter. Unable to read or write out-of-core i am a new member of the group and just starting with comsol modeling. The smaller the value the more your function will look like a real heavyside function, so you maybe have to find a compromise between solution time and approximation niveau of your heavyside function. Solution. Your Discussion has gone 30 days without a reply. 41) is greater than the relative tolerance. "Failed to find a solution. how can i find solution in this situation? what means that messages? Failed to find a solution for the initial parameter. Not all parameter steps returned. 00227532,0. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers Failed to find a solution: No convergence, even when using the minimum damping factor. Note that while COMSOL employees may participate in the discussion forum, Failed to find solution. at coordinates: (0,0,0), Returned solution is not converged. -----I have added a few variables, and I believe that my strain energy function should work fine for the entire domain. Returned solution has not converged. When solving the systems of linear equations of a simulation, COMSOL will automatically detect the best solver without requiring any user interaction. frequency domain) Concluding Thoughts on Direct and Iterative Solution Methods. Posted 11 mars 2013 à 16:47 UTC−7 RF & Microwave Engineering Version 4. failed to find a solution and singular matrix. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers Tried all possible solutions: 1) direct solver: not enough memory 2) raised number of iterations 3) changed tolerance 4) changed mesh The convergence plot stops at about 8th iteration and says Error: Failed to find a solution. 23 February 2021 9,085 3 View Then you can use finer mesh by using the solution as the initial condition. In the nonlinear analysis, this is done in every iteration, and in a linear analy Failed to find a solution. Failed to evaluate expression. Solution. any idea how to sort the error and to calculate efficiently ( if possible ) . Time 1. Multigrid canceled. 2a 1 Reply FORUM Error: COMSOL Installer has stopped working - Windows 7 64-bit; KNOWLEDGE BASE Error: Failed to find a solution. Posted 2020/03/16 10:28 GMT-7 AC/DC & Electromagnetics Version 5. 5 2 Note that while COMSOL employees may participate in the discussion Failed to find a solution. "and to reach this error it takes abnormally long time. In the nonlinear analysis, this is done in every iteration, and in a linear analy Tried all possible solutions: 1) direct solver: not enough memory 2) raised number of iterations 3) changed tolerance 4) changed mesh The convergence plot stops at about 8th iteration and says Error: Failed to find a solution. 2) Play with the forces that you apply. If you are using the Simplex LP Solving method, and the model is well scaled, Solver has determined for certain that Failed to find a solution. I’m modeling microindentation of epoxy and comsol is really struggling with large plastic deformation near the tip How can I find the effect of different parameters like (Reynolds number, Hartman number, volume friction etc. Top layer is of 1 micrometer thick titanium layer, middle one is 2 micrometer thick silicon dioxide layer and bottom layer is of 3 micrometer thick polysilicon layer. I hope i got your problem. For instance, use only 10% of the current force. 8e+006) is greater than the relative tolerance. Posted 2010. 5 2 Note that while COMSOL employees may participate in the discussion FORUM Error: COMSOL Installer has stopped working - Windows 7 64-bit; KNOWLEDGE BASE Error: Failed to find a solution. unfortunately i am facing my first problem already and i hope someone can help me. Messages similar to this are returned for nonlinear problems that fail to converge, but also sometimes for linear problems. In the nonlinear analysis, this is done in every iteration, and in a linear analy Solution. Returned solution is not converging. To simplify the calculations and to obtain easier results, I have carried out many approximations: air flows between two parallel and vertical plates ignoring the different elements between both Solution. Note that while COMSOL employees may participate in the discussion forum, COMSOL Failed to find a solution for the initial parameter. 32 GB Virtual memory: 4. // Time: 31 s. To simplify the calculations and to obtain easier results, I have carried out many approximations: air flows between two parallel and vertical plates ignoring the different elements between both BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers; FORUM Failed To Find A Solution And Singular Matrix; BLOG Improving Convergence of Multiphysics Problems; KNOWLEDGE BASE Maximum number of linear iterations reached; FORUM The Problem: the maximum gain is bigger than the maximum directivity. '' Posted 13-Jan-2017, 8:38 am GMT-8 Fluid, Computational Fluid Dynamics (CFD), Installation & License Management, Modeling Tools, Parameters, Variables, & Functions, Studies & Solvers 2 Replies Failed to find a solution: Singular MATRIX. M ake sure that study steps (e. V. . stucked in some value of power 1e-8) Nonlinear solver did not converge. '' Posted 2017/01/13 11:38 GMT-5 Fluid, Computational Fluid Dynamics (CFD), Installation & License Management, Modeling Tools, Parameters, Variables, & Functions, Studies & Solvers 2 Replies Failed to find a solution. 5 2 Note that while COMSOL employees may participate in the discussion and "Can't find comsol. It's quite a simple task to plot the fields inside the wire, but I fail when Excel Solver - Solver could not find a feasible solution (5). 01. In segregated group 1: The relative error (. '' Posted 2017/01/13 11:38 GMT-5 Fluid, Computational Fluid Dynamics (CFD), Installation & License Management, Modeling Tools, Parameters, Variables, & Functions, Studies & Solvers 2 Replies I am a new user, and I am very impressed, Comsol is perfectly simulated in chemical reactor design And when I began using of Comsol I have some problems with it. In the nonlinear analysis, this is done in every iteration, and in a linear analy FORUM Error: COMSOL Installer has stopped working - Windows 7 64-bit; KNOWLEDGE BASE Error: Failed to find a solution. ————————————————————-Here, there isn’t an option of aattaching the COMSOL file, else I would have attached it for your convenience. freq1. If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base. It's quite a simple task to plot the fields inside the wire, but I fail when I was trying to plot scattered pressure from the far-field of a 2D circle. Returned solution is not converged. Posted 2010/01/27 6:26 GMT-8 2 Replies . This message appears when Solver could not find any combination of values for the decision variables that allows all of the constraints to be satisfied simultaneously. Maximum number of intermediate iterations reached. ) . I have tried increasing the number of iterations but it seems that its stopping at 12-14% progress for computing the simulation. … " Possible Solutions: Study s teps might be listed in wrong order: COMSOL works top-down. 오전 9시 26분 50초 GMT-5 2 Replies "Failed to find a solution. Unable to read or write out-of-core file. Segregated Step 1 System matrix is zero. Therefore, I assume the model is fine, and the problems are in the scale. I am designing a microactuator in comsol multiphysics which is basically a cantilever consisting of three layers. it continue showing me "Failed to find a solution. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help. 008625), Solution. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers Singular matrix and failed to find a solution. System matrix is zero. 1. If you get an answer, use the solution as the initial condition for 0. 00212369,0. at coordinates: (0. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers I am modeling it after the "spiral_inductor_example" also listed below, an example inductor made by comsol. 2F and so forth. Going through discussion forum, someone suggested that unchecking "p" on "solver manager" in "solver paramters" would help solve the problem. 000686822,0. Failed to find a solution: No convergence, even when using the minimum damping factor. ) in COMSOL? Here I am facing this problem. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers I am a new user, and I am very impressed, Comsol is perfectly simulated in chemical reactor design And when I began using of Comsol I have some problems with it. Returned solution is not converged; FORUM Helmholtz with Flow Tutorial Not working at Higher Mach Numbers; BLOG Solutions to Linear Systems of Equations: Direct and Iterative Solvers Error: Failed to find a solution for all parameters,even when using the minimum parameter step. Note that while COMSOL employees may participate in the discussion forum, COMSOL Memory error, Failed to find a solution.