Group convection_boxRayleighNumber

Overview

The group is configured with:

gravity_magnitude: [300.0, 1000.0, 100000.0]

initial_global_refinement: [4]

The group is tested with:

The group is genearated with extra settings:

Test different choice of rayleigh number

Fields result, computational time, statistic results

  • For Ra = 3e2, no apparent convection going on at t = 0.5, 2 steps to t = 0.5 Heat flux2 = -1.00003298, Heat flux3 = 1.00003298, resemble a pure conduction; RMS Velocity is decreasing in time

  • For Ra = 1e3, no apparent convection going on at t = 0.5, about 8 steps to t = 0.5 Heat flux2 = -1.00927632, Heat flux3 = 1.00927632; RMS is increasing so that this case is developing towards a convection

  • For Ra = 1e4, apparent convection going on at t = 0.5, about 1000 steps to t = 0.5 Heat flux2 = -4.88459731, Heat flux3 = 4.88459731, RMS Velocity = 42.8656928

  • For Ra = 1e5, apparent convection going on at t = 0.5, about 6000 steps to t = 0.5 Heat flux2 = -10.4951125, Heat flux3 = 10.4951125, RMS Velocity = 193.087843