<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[两相流通过湍流模型求解粘度项和直接求解粘度项不一致？]]></title><description><![CDATA[<p dir="auto">最近在尝试改不同的两相流求解器，遇到了一个问题。<br />
当前OF的两相粘度项是通过湍流模型计算的。<br />
turbulence-&gt;divDevRhoReff(rho, U)<br />
当我的case不需要湍流使用laminar时，结果和文献结果不匹配：<br />
<img src="/assets/uploads/files/1723789073210-0ea26513-f66c-4336-9980-d318d48771d7-image.png" alt="0ea26513-f66c-4336-9980-d318d48771d7-image.png" class=" img-fluid img-markdown" /></p>
<p dir="auto">当我改成直接用拉普拉斯求解：</p>
<ul>
<li>fvm::laplacian(nu*rho, U)<br />
结果：<br />
<img src="/assets/uploads/files/1723789135144-5c99cc05-b094-4a57-9e9e-64945af14f49-image.png" alt="5c99cc05-b094-4a57-9e9e-64945af14f49-image.png" class=" img-fluid img-markdown" /></li>
</ul>
<p dir="auto">此时与文献结果一致，请问李老师这是什么原因啊？</p>
]]></description><link>https://cfd-china.com/topic/7354/两相流通过湍流模型求解粘度项和直接求解粘度项不一致</link><generator>RSS for Node</generator><lastBuildDate>Sun, 16 Aug 2026 23:10:29 GMT</lastBuildDate><atom:link href="https://cfd-china.com/topic/7354.rss" rel="self" type="application/rss+xml"/><pubDate>Fri, 16 Aug 2024 06:20:33 GMT</pubDate><ttl>60</ttl><item><title><![CDATA[Reply to 两相流通过湍流模型求解粘度项和直接求解粘度项不一致？ on Mon, 19 Aug 2024 07:30:00 GMT]]></title><description><![CDATA[<p dir="auto"><a class="plugin-mentions-user plugin-mentions-a" href="https://cfd-china.com/uid/1">@李东岳</a> 李老师，在写fvm::laplacian项之前已经通过体积分数alpha计算过nu了。因为我觉得直接修改turbulence::类里面的nu很麻烦。所以我就自己定义了提及标量场nu然后正常使用alpha计算之后带入laplacian，所以获得了与文献一致的结果。</p>
]]></description><link>https://cfd-china.com/post/39752</link><guid isPermaLink="true">https://cfd-china.com/post/39752</guid><dc:creator><![CDATA[WangQi 0]]></dc:creator><pubDate>Mon, 19 Aug 2024 07:30:00 GMT</pubDate></item><item><title><![CDATA[Reply to 两相流通过湍流模型求解粘度项和直接求解粘度项不一致？ on Sat, 17 Aug 2024 06:57:43 GMT]]></title><description><![CDATA[<p dir="auto">即使结果能对上，你植入laplacian(nu,U)是不正确的，nu在VOF里面不是常数，你这么植入缺少项。<br />
<a href="http://dyfluid.com/interFoam.html" target="_blank" rel="noopener noreferrer nofollow ugc">http://dyfluid.com/interFoam.html</a><br />
方程31</p>
]]></description><link>https://cfd-china.com/post/39740</link><guid isPermaLink="true">https://cfd-china.com/post/39740</guid><dc:creator><![CDATA[李东岳]]></dc:creator><pubDate>Sat, 17 Aug 2024 06:57:43 GMT</pubDate></item></channel></rss>