Summary

One example of the use of the gap element is to consider current flow through a bulk conductor insulated by the gap element. This analysis can be performed with EMSolution r8.6.

Explanation

Consider the model shown in Fig. 1. The model is a 1/8 model, vertically symmetric, with 90-degree rotational symmetry; it can also be symmetric at x=0 and y=0. The gap surfaces (1) and (2) are also defined as surface inflow current (SUFCUR) surfaces and act like electrodes. Each surface is connected to the power supply by CIRCUIT. In this case, we assume equal currents in opposite directions and connect a constant current source. The gap plane (3) insulates the conductors and divides the gap planes (1) and (2). The analysis is a steady-state AC analysis at 50 Hz.

Fig. 2 and Fig. 3 show the current density distribution flowing in the conductor at phase 0 degrees. It can be seen that the prescribed current is flowing.

Fig.1 Analysis model

Fig.2 Current density distribution

Fig.3 Current density distribution

How to use

Defines SUFCUR for a face element.

* SUFCUR * SERIES_NO * TIME_ID * SURFACE_MAT_ID * CURRENT * SUFCUR 1 0 11 1.0 SUFCUR 2 0 12 1.0

Connect the defined SUFCUR to the power supply.

* CIRCUIT * CIRCUIT * NO_SERIES * NO_POWER_SUPPLIES * REGION_FACTOR * 2 2 8 * SERIES_IDS * 1 2 * SERIES_EXTERNAL_INDUCTANCE * 0.0 0.0 0.0 * SERIES_EXTERNAL_RESISTANCE * 0.0 0.0 0.0 * CONNECTION_MATRIX * 1.0 0.0 0.0 1.0 * PS_ID * TYPE * TIME_ID * INITIAL_CURRENT * 1 0 1 0.0 2 0 2 0.0

Download

Bifurcated conductor model　　Sample data DL

・ input
・ pre_geom2D.neu
・ 2D_to_3D