The interplay of fast waves and slow convection in geodynamo simulations nearing Earth’s core conditions

Numerical Simulations of Geodynamo and Liquid Metal Convection

Development of Numerical Methods for Geodynamo and Mantle Convection Simulations

2. Development of New Spherical Grid: Yin-Yang Grid Since the finite difference method enables us to make highly optimized programs for massively parallel computers, we exploit the possibility of the finite difference method for simulations in spherical shell geometry with radius r (ri ≤ r ≤ ro), colatitude θ (0 ≤ θ ≤ π), and longitude φ (0 ≤ φ < 2π). Because there is no grid mesh that is ortho...

Geodynamo Simulations under Earth-like Conditions

A number of dynamo simulations were performed during 2005 based on a Spectral Transform Method (STM). In one series of geodynamo simulations, the Ekman (Ek) and the Rayleigh (Ra) number dependences of the dynamo action were examined in detail. The change of the pattern of the fluid motion was observed as a function of Ra at Ek = 4 × 10–5.. The dynamo simulations at the lower value of Ek = 4 × 1...

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

Geodynamo theory and simulations

80 years ago, Joseph Larmor planted the seed that grew into today’s imposing body of knowledge about how the Earth’s magnetic field is created. His simple idea, that the geomagnetic field is the result of dynamo action in the Earth’s electrically conducting, fluid core, encountered many difficulties, but these have by now been largely overcome, while alternative proposals have been found to be ...