Fig. 1. The circular microtube model with uniform velocity fluids.

Fig. 2. The far-field distribution of GM field in the microtube model: (a) The intensity plots of GM field's along y-direction in y-z plane of microtube model; (b) the distribution of GM field's along y-direction in x-y plane of microtube model; (c) the b-y function along y-direction in x-y plane of microtube model.

Fig. 3. The test-particle's track in linear time-varying GM field: (a) The left view of the test-particle's track; (b) the main view of the test-particle's track; (c) the test-particle's track in the whole space.

Fig. 4. The test-particle's track in cosine time-varying GM field: (a) The top view of the test-particle's track; (b) the left view of the test-particle's track; (c) the test-particle's track in the whole space.

Fig. 5. The rotating spherical shell model for studying the gravitational induction effect.

Fig. 6. The demonstration model for studying gravitational induction based on the microtube model.

Fig. 7. The parameter description of fluid and the vortex field’s simulation: (a) The linear function between the angular momentum L and time; (b) the distribution of vortex field in the z = 0 plane which produced by the ring 2; (c) the fluid’s stressed region in the plane of the ring 2.