The following user-defined variables generate built-in variables such as space and time derivatives. SeeShape Function Variablesfor information about those built-in variables.以下用户定义的变量生成内置变量,如空间和时间导数。有关这些内置变量的信息,请参阅形状函数变量。 Table 5-15:User-defined variables...
1、Summary of Built-In Variables With Reserved NamesThis section is an overview of the built-in elements of the following categories as defined by the underlying COMSOL language:ConstantsVariablesFunctionsThese language elements are built-in or user-defined. In addition there are operators that ...
Constants ?Variables ?Functions Theselanguageelementsarebuilt-inoruser-defined.Inadditionthereaoperatorsthatcannotbeuser-defined,andexpressions,whicharealwaysuser-defined. 具有保留名称的内置变量摘要本节概述了由基础COMSOL语言定义的以下类别的内置元素:这些语言元素是内置的或用户定义的。止匕外,还有不能由用户定义...
Here, the components of the current density vector are available as built-in variables, namely,ec.Jx,ec.Jy, andec.Jz. You can also find similar variables for the the flux quantity in other physics interfaces. The COMSOL software automatically computes the normal vector for all of the boundari...
capacitance. Of course, we will want to compare this value and our computed sensitivities to the analytic values so we can define some variables for these quantities. We can use the built-in differentiation operator,d(f(x),x), to evaluate the exact sensitivities, as shown in the screenshot...
Current thread (0x000000000015c800): JavaThread "main" [_thread_in_native, id=5940, stack(0x...
When you use the names of the dependent variables in a results expression, COMSOL Multiphysics uses the solution associated with the selected parameter value; eigenvalue; or time for a parametric analysis, eigenvalue analysis, or time-dependent analysis, respectively. To access other solutions in th...
Form declarations are used to limit the scope of variables and thereby logically separate the different parts of an application. Built-in Elementary Math Functions Elementary math functions for use in methods are available in the Java math library. Some examples: double a = Math.PI; // the ...
configurations,resonantvibrationswillappearinthebeam. MODELINGTRAVELINGLOADS Thepossibilitytoenteranalyticalexpressionsandusebuilt-inorexternalfunctionsin theinputfieldsforloadsandboundaryconditionsmakesiteasymodeltravelingloads inCOMSOL.Aloadwithaconstantdistributionmovingwithaconstantvelocityv ...
The solver is responsible for solving the equations that describe the physical phenomena in the system. 6. Running the Simulation: With all thesetup steps completed, we can now run the simulation. COMSOL will solve the equations numerically and provide the results for the specified variables of ...