Error Estimate and Adaptive Refinement in Mixed Discrete Least Squares Meshless Method

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="721240.fig.0019a" src="https://static.hindawi.com/articles/mpe/volume-2014/721240/figures/721240.fig.0019a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Initial nodes = 84</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="721240.fig.0019b" src="https://static.hindawi.com/articles/mpe/volume-2014/721240/figures/721240.fig.0019b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>First step enrichment nodes = 120</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="721240.fig.0019c" src="https://static.hindawi.com/articles/mpe/volume-2014/721240/figures/721240.fig.0019c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Second step enrichment nodes = 181</td></tr></table></td></tr><tr class="fig-image" id="d"><td><img alt="721240.fig.0019d" src="https://static.hindawi.com/articles/mpe/volume-2014/721240/figures/721240.fig.0019d.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(d) </b>Third step enrichment nodes = 284</td></tr></table></td></tr></table>

<table>Initial and refined (node enrichment) nodal configurations (Example <a href="https://static.hindawi.com/articles/mpe/volume-2014/721240/figures/#ex3">3</a>).</table>

Mathematical Problems in Engineering

fig19

Figure 19

Figure 19: Error Estimate and Adaptive Refinement in Mixed Discrete Least Squares Meshless Method 