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<div class="" style="word-wrap:break-word; line-break:after-white-space"><span class="" style="font-size:14px">Hello:</span>
<div class=""><span class="x_Apple-tab-span" style="font-size:14px; white-space:pre"></span><span class="" style="font-size:14px">Thanks for giving some hints about adaptive mesh refinement with the help of Roland, but I feel sorry that I came across some new
problems about cell-centering when I try to simulate "the transition from wormholes to trumpets” considering Schwartzchild metric.</span></div>
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<div class=""><span class="x_Apple-tab-span" style="font-size:14px; white-space:pre"></span><span class="" style="font-size:14px">Since the singularity (0,0,0) exists under the metric of Schwartzchild, I want to make use of cell-centered method to avoid the
singularity. Although there is an option CartGrid3D::avoid_origin = “yes” in the thorn CartGrid3D, it seems that it doesn’t works properly: the data related to the grid points (0,0,0) is still been calculated (very large!). The related par file is attached
in the attachment.</span></div>
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<div class=""><span class="" style="font-size:14px"><span class="x_Apple-tab-span" style="white-space:pre"></span>So I am wondering is there a method to solve the problem or any parameters of thorns governing the cell-centering methods?</span></div>
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<div class=""><span class="" style="font-size:14px">Thanks!</span></div>
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<div class=""><span class="" style="font-size:14px">Best Regards!</span></div>
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<div class=""><span class="" style="font-size:14px">Xiaoxiao</span></div>
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