Electrodynamic Potential Model Reference
The Electrodynamic Potential model allows you to model electric currents in conducting materials.
This model calculates the electric potential according to Eqn. (4277). From the electric potential, Simcenter STAR-CCM+ calculates the electric field Eqn. (4232) and the electric current density Eqn. (4228). This model can be coupled together with the magnetic vector potential models, which include the magnetic vector potential term in Eqn. (4277).
Model Name | Electrodynamic Potential | ||
Theory | See Potential Formulation of the Governing Equations and Concentrated Solutions. | ||
Provided By | |||
Example Node Path | |||
Requires |
Physics Models:
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Activates | Material Properties | Electrical Conductivity. See Material Properties. | |
Initial Conditions | Electric Potential. See Initial Conditions. | ||
Boundary Inputs |
See Boundary Settings. |
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Region Inputs |
See Region Settings. |
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Interface Inputs |
See Interface Settings. |
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Solvers | Electric Potential. See 电势求解器参考. | ||
Monitors | Electric Potential | ||
Field Functions | See Field Functions. |
Material Properties
- Electrical Conductivity
- 指定导电率 (请参见)。导电率:广义欧姆定律
Initial Conditions
- 电势
- 用于将电势初始化为指定的标量分布。
Boundary Settings
Applies to all boundary types other than Overset Mesh and Symmetry Plane.
- Electric Potential Specification
- At the domain boundaries, allows you to prescribe either the electric potential, the electric current, or the electric current density. See 边界和交界面条件.
- Electrical Resistance Option
- Only available when Electric Potential Specification is not set to Insulator.
- Correction Factor
- When On, Simcenter STAR-CCM+ ensures the specific resistivity distribution over the boundary surface generates an ohmic heat equivalent to . When using this option the current must flow in the same direction.
- Electric Current Distribution
- When defining the
electric current at the boundary, this setting specifies the electric
current spatial distribution. The available options are:
- Uniform Electric Potential—calculates the specific electric current spatial distribution so that the electric potential is constant along the boundary. When you use this method, it is recommended you set the Under-Relaxation Factor to 1.0. If you experience convergence issues it is recommended you modify the Convergence Tolerance and Max Cycles under the node.
- Uniform Specific Electric Current—prescribes a constant specific electric current spatial distribution.
- 单位电流导数选项
- 定义边界处的单位电流时,此选项可用于指定单位电流对电势的导数。通常,可通过线性化与之间的关系来定义,从而提高稳定性。
- Electromotive Force Source Option
- Allows you to
specify a source of electromotive source at the boundary level, overriding
the electromotive source that is specified for the region. This option is
available when you do both of the following:
- You activate the region condition Electromotive Force Source Option.
- You activate the region property Allow Per-Part Values.
Region Settings
- Fluid, Solid, and Porous Regions:
- The following region settings allow you specify additional sources of electric current, that are not directly modeled in the simulation. When you do not need to account for unresolved physics, you typically leave these source terms to the default value of zero.
- Porous Regions:
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- 有效的多孔导电率选项
- 指定用于计算多孔材料有效导电率的方法。
Interface Settings
- Contact Electric Potential Specification
- Available for fluid/solid and solid/solid contact interfaces, allows you to prescribe the electric potential at the interface.
- Electrical Resistance Option
- Available for fluid/solid and solid/solid contact interfaces.
- Correction Factor
- When On, Simcenter STAR-CCM+ ensures the specific resistivity distribution over the interface generates an ohmic heat equivalent to . When using this option the current must flow in the same direction.
- Electrodynamic Phase Contact Option(电动相接触选项)
-
用于电气连接固体区域和流体区域的多孔固相。
同时满足以下两个条件时可用:- 在固体连续体中选择电动势模型
- 在流体连续体或流体连续体的多孔固相中选择电动势模型
- 电流源选项
- 适用于流体/流体交界面,可用于指定交界面处的电流。
- 绝缘选项
- 用于指定电流是否流经交界面。
- Mapped Contact Interface
-
The Mapped Contact Interface is not supported by the Electrodynamic Potential model. However, if the simulation uses another model that supports the Mapped Contact Interface (for example, Segregated Solid Energy) on both interfacing regions, the Mapped Contact Interface becomes available but only when the Electrodynamic Potential model is selected in one of the interfacing regions, and not in both. For properties, see Mapped Contact Interface.
Field Functions
- Boundary Specific Electric Current(边界单位电流)
- 表示单位电流 (Eqn. (4283)),带负号。
- 电流密度
- 表示Eqn. (4228)中的电流密度。
- 导电率
- 表示各向同性材料的标量导电率(请参见Eqn. (4228))。
- 导电率(对称张量)
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对于多孔区域和各向异性固体区域,Eqn. (4228)中的导电率为对称张量。对于多孔区域,此场函数表示有效导电率张量(请参见Eqn. (4230))。