I am just wondering if there is a time integration function in comsol 3.5a. I am calculating fluid flow rate through a boundary and which is a function of time and I would like to integrate the flow rate with respect to time to get cumulative production. I am aware comsol 4 has the t...
you can evaluate:timeint(1,2,T)to evaluate the integral of the expressionTfrom1-2seconds. You can call integration operators within thetimeintoperator as well. See theBuilt-in Operatorssection of theCOMSOL Multiphysics Reference Manualfor additional documentation on thetimeintoperator. ...
The log shows the iteration counterStepfor the time integration loop at the currentTimewhereStepsizeis the size of the current time step. The next three columns detail the total number of residual assembles (Res), the total number of Jacobian assembles (Jac), and the total number of linear...
In COMSOL Multiphysics, a system of time-dependent partial differential equations (PDEs) is turned into an implicit system of ODEs (or differential-algebraic equations; i.e., DAEs) by means of a finite element spatial discretization. (Note that this is not the case for the discontinuous Galerk...
“All” in theSurface Integrationsettings window, when you then click “Evaluate”, the L2 difference between the solution on the finest mesh and all other meshes will be evaluated and tabulated. To this end, the COMSOL software takes the solution for each value of the sweep parameter and ...
timeIntegration {BE | NM} <β> <γ> BE: Backward Euler (default) NM: Newmark (optional: add β and γ to change from default of 0.25 and 0.5) dampingStiff <dampingStiff> add lagged Rayleigh damping with stiffnessdampingStiffor not ifdampingStiffis zero or not specified ...
Electrostatic simulations in COMSOL (R) have been performed to optimize the wire spacing maximizing the sensitivity of the electric time domain reflectometry measurements. Tooling with integrated wires placed with optimal spacing has been fabricated. TDR flow monitoring experiments with the integrated ...
(a) Two-layered ground problem modeled in COMSOL software, (b) 3D view of the TR-MUSIC pseudospectrum obtained by the 2D-FEM method. Target located near the interface between two layers. 2.2.3 Localization of Multiple Targets In this example, we consider three landmines buried in a two-lay...
If I include it again, I always get a 2% error (1.02 kg) for the time integration over the massflow at the exit boundary. I have tried literally everything I can think of. Is this just the highest accuracy achievable? Is it because COMSOL uses FEM (finite element method) instead of...
Time integration of a variable over the domainPosted 2013年8月14日 GMT+8 14:28 Fluid & Heat, Computational Fluid Dynamics (CFD), Studies & Solvers Version 4.2a 0 Replies Prashant Agrawal Send Private Message Flag post as spam Hi, I am solving a periodic fluid flow problem over a 2D...