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<span style="margin:0px;font-size:12pt;color:black;background-color:rgb(255, 255, 255)"><span style="margin:0px;font-size:11pt">Hi all,</span></span>
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<span style="margin:0px;font-size:11pt">I am running a simple laser slab (vacuum + CH target) problem with addition of viscosity in my problem. I have used the flux-based implementation of viscosity with the unsplit hydro solver. Constant kinematic v</span><span style="margin:0px;font-size:11pt">iscosity
is input via<span> </span></span><b><span style="margin:0px;font-size:11pt">materialProperties/Viscosity</span></b><span style="margin:0px;font-size:11pt"><span> </span>module. </span></div>
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<span style="margin:0px;font-size:11pt">Below are the lineouts taken at location shown in the figure. It totally makes sense that my shock front has flattened out with use of some viscosity. All my density, vely and tele plots seem ok. But in my pressure plot,
I see a strange artifact (an unsual spike at ~ the ablation front location) that I don't observe in my inviscid simulations. I even lowered my CFL (to ~0.05) to see if that would mitigate the issue (which to me look like some numerical issues) but it still
persists.</span></div>
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<span style="margin:0px;font-size:11pt">Has anyone encountered a similar issue with viscosity implementation in laser driven simulation? I would really appreciate any suggestions or feedbacks.</span></div>
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<span style="margin:0px;font-size:11pt">Thanks,</span></div>
<span style="margin:0px;font-size:12pt;color:black;background-color:rgb(255, 255, 255)"><span style="margin:0px;font-size:11pt">Nitish</span></span><br>
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<p style="margin-top:0; margin-bottom:0"><span style="font-size:10pt">---------------------------</span></p>
<p style="margin-top:0; margin-bottom:0"><span style="font-size:10pt">Nitish Acharya</span></p>
<p style="margin-top:0; margin-bottom:0"><span style="font-size:10pt">PhD Student</span></p>
<p style="margin-top:0; margin-bottom:0"><span style="font-size:10pt">Department of Mechanical Engineering</span></p>
<p style="margin-top:0; margin-bottom:0"><span style="font-size:10pt">University of Rochester</span></p>
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