ome settings that might help include: browse down to the Fully Coupled node inside your study. In order to make this node appear, you may need to first right-click the Study node and select Show Default Solver. While in the Fully Coupled node, click the Settings tab and make the settings -> Jacobian update (from Minimal to On every iteration), the Maximum number of iterations (from 4 to 25), and the Tolerance factor (from 1 to 1e-3). Updating the Jacobian on every iteration increases the stability of the nonlinear process. The maximum number of iterations sets a limit to how many iterations can be performed; a process otherwise controlled by the tolerance factor.
For time-dependent waves models
The accuracy in a model solving an equation for electromagnetic, structural, or any other kind of waves is often limited by how well the mesh resolves the waves. Time-dependent wave equations also put constraints on the time steps used by the solver. This article describes how you can control the mesh and the solver settings to get an accurate solution.
Start by deciding what mesh size you want to use. Just like in the frequency domain, you will need at least approximately 5 second-order mesh elements per wavelength. Keep in mind that in a time domain model, your wave does not consist of just one frequency, but can rather be described as a frequency spectrum. For example assume a model that uses Gaussian pulses with a standard deviation of √2/(2πf0). With this expression, most of the energy content in the pulse (95.5%) will be distributed over frequencies lower than f0. If you want to resolve these frequencies, the maximum allowed mesh element size becomes h0 = c/(N*f0), where c is the local speed of light or sound, and N = 5 the number of mesh elements per wavelength.
You should aim for a time step that resolves the wave equally well in time as the mesh does in space. Any longer time steps will not make optimal use of the mesh, and any shorter time steps will lead to longer solution times with no considerable improvements to the results. The relationship between mesh size and time step length is known as the CFL number: CFL = c*Δt/h, where Δt is the time step and h is the mesh size. In practice, with the default second order mesh elements, a CFL number of 0.2 proves to be near optimal.
By default, the time dependent solver will continuously adjust the time step in order to fulfill your specified tolerances. If you already know the time step that you want the solver to take, it is easier and more efficient to set it manually. This is done on the Settings tab of the Time-Dependent Solver node. In order to make this node appear, you may need to right-click the Study node and select Show Default Solver. Note that changing the number of output times in the Step 1: Time Dependent node controls the output times, but has little effect on the time steps actually taken by the solver.
For time-dependent waves models
The accuracy in a model solving an equation for electromagnetic, structural, or any other kind of waves is often limited by how well the mesh resolves the waves. Time-dependent wave equations also put constraints on the time steps used by the solver. This article describes how you can control the mesh and the solver settings to get an accurate solution.
Start by deciding what mesh size you want to use. Just like in the frequency domain, you will need at least approximately 5 second-order mesh elements per wavelength. Keep in mind that in a time domain model, your wave does not consist of just one frequency, but can rather be described as a frequency spectrum. For example assume a model that uses Gaussian pulses with a standard deviation of √2/(2πf0). With this expression, most of the energy content in the pulse (95.5%) will be distributed over frequencies lower than f0. If you want to resolve these frequencies, the maximum allowed mesh element size becomes h0 = c/(N*f0), where c is the local speed of light or sound, and N = 5 the number of mesh elements per wavelength.
You should aim for a time step that resolves the wave equally well in time as the mesh does in space. Any longer time steps will not make optimal use of the mesh, and any shorter time steps will lead to longer solution times with no considerable improvements to the results. The relationship between mesh size and time step length is known as the CFL number: CFL = c*Δt/h, where Δt is the time step and h is the mesh size. In practice, with the default second order mesh elements, a CFL number of 0.2 proves to be near optimal.
By default, the time dependent solver will continuously adjust the time step in order to fulfill your specified tolerances. If you already know the time step that you want the solver to take, it is easier and more efficient to set it manually. This is done on the Settings tab of the Time-Dependent Solver node. In order to make this node appear, you may need to right-click the Study node and select Show Default Solver. Note that changing the number of output times in the Step 1: Time Dependent node controls the output times, but has little effect on the time steps actually taken by the solver.
استفاده از قابلیت Continue در نرم افزار کامسول
در کامسول این امکان وجود دارد که تحلیل را متوقف نمود و ادامه آن را بعد از مدتی Resume کرد. جهت متوقف نمودن، هنگام تحلیل، در زبانه Progress بر روی Stop کلیک کنید (ترجیحا Solution)
در کامسول این امکان وجود دارد که تحلیل را متوقف نمود و ادامه آن را بعد از مدتی Resume کرد. جهت متوقف نمودن، هنگام تحلیل، در زبانه Progress بر روی Stop کلیک کنید (ترجیحا Solution)
سپس در قسمت Study، گزینه Continue فعال خواهد شد.
میتوانید فایل را ذخیره نمایید و تحلیل را در یک سیستم دیگر ادامه دهید.
میتوانید فایل را ذخیره نمایید و تحلیل را در یک سیستم دیگر ادامه دهید.