Ivar KJELBERGCOMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH) Send Private MessageFlag post as spam Posted:1 decade ago Hi if you define a flux and a fixed temperature on the same boundary these are in contradiction, as the temperature is stabilised by exchanging...
In this case, you are not really doing "time dependent" physics at all. Rather, you are just exploring a parameter range of static potential values on your electrodes (which, for example, you might "vary with time" by turning a knob on your power supply). For example, if your cavity ...
Time-dependent boundary conditionAnalytical solutionThe analytical solution for the temperature field in an infinite solid medium which surrounds a cylindrical surface, determined by Carlslaw and Jaeger for the case of constant heat flux, is extended to the case of any time dependent heat flux. Then...
1b). The time-dependent drive is simulated by periodic modulation along a spatial axis in a static 3D lattice, which is a common method of realising Floquet dynamics14,30. Unlike static HOTIs, the corner states in the Floquet HOTI can oscillate in time, with oscillation period either equal...
In COMSOL (COMSOL Multiphysics v. 5.5, Stockholm, Sweden), the Domain ODEs (ordinary differential equations) and DAEs (differential-algebraic equations) interface was used to solve the differential equation of the Voigt model [31]. The time and space varying displacements in the vertical direction...
This approach saves us a significant amount of computational effort, since we now only need to mesh the air domain and apply theImpedanceboundary condition. Obviously, we do lose some information here: the current distribution within the conductor. But if we do not care about that, then this ...
(8) set as space- and time-dependent functions. However, Eq. (8) is a hypothetical one that requires an external energy source, because density modulation ρ(χ) cannot be achieved at no cost, and the implementation of modulation will make the governing equation deviate from the previous ...
time-domain (FETD) and finite-volume time-domain (FVTD) meshes; 3D modeling of the sinusoidal steady-state electromagnetic wave absorption by a full human body; modeling of microstrips; introduction of higher order spatial derivatives; modeling of frequency-dependent dielectric permittivity and ...
In a previous blog entry, we discussed thejoinfeature in COMSOL Multiphysics in the context of stationary problems. Here, we will address parametric, eigenfrequency, frequency domain, and time-dependent problems. Additionally, we will compare and contrast the built-inwithandatoperators versus solution...
Hello, I wonder if someone could offer some insight on this issue. I am doing a very simple 1D transient thermal conduction/convection analysis. I am trying to define a time dependent boundary condition by defining a function which is interpolated from the data in a text file. I got the ...