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哈哈哈

@hustzzw 微信图片_20221101093137.png
就像这个图中里面圆柱区域和外面圆环柱区域

各位大佬，最近想用OF计算固定的多体装置，由于在大域内生成的结构过于粗糙 需在小域里生成 然后用mergeMesh合并到大域里去，但是小域的边界没办法删除
请问各位大佬，有没有什么设置建议？删除边界或指定特殊的边界？

@evensun 能在高校待时间长的，必然都有外快。各有各的路子，有些大家能看见，有些大家看不见。否则待个5 6年必然就走了。

@youhaoyu 1719302824186.jpg 看了本比较通用的书，里面把我第一张图里（1.15）直接写在方程里面的（我感觉这样写比较合适）。那么这个R0和Pg0我还是不理解什么意思，有没有大佬解释解释

今天收到一封邮件，邀请我审一本书。

Hi https://cfd-china.com/user/tidedrinker

我在使用of2306也出现类似的情况，我的波频是1.3 而且不同网格密度的相位差和衰减率有明显差异

但是我在使用最密网格（单位波高内20个网格）时，总是卡在67 迭代不出来 最终计算发散

Courant Number mean: 1.18882076445e-06 max: 7.50119780436 Interface Courant Number mean: 3.00160678714e-08 max: 3.95428576669 deltaT = 6.18380398924e-152 Time = 67.132 PIMPLE: iteration 1 Updating StokesI wave model for patch inlet smoothSolver: Solving for alpha.water, Initial residual = 5.38442986655e-09, Final residual = 5.38442986655e-09, No Iterations 0 Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 MULES: Correcting alpha.water MULES: Correcting alpha.water Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 Updating shallowWaterAbsorption wave model for patch outlet DICPBiCGStab: Solving for p_rgh, Initial residual = 0.844109801632, Final residual = 0.00558442869736, No Iterations 20 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.742328538632, Final residual = 0.00717435702295, No Iterations 26 time step continuity errors : sum local = 1.13821305653e-09, global = -5.40663033957e-10, cumulative = 2.0897431155e-05 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.823953322827, Final residual = 0.00800680485496, No Iterations 25 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.867377012998, Final residual = 9.38111948679e-10, No Iterations 389 time step continuity errors : sum local = 9.20755023008e-16, global = 7.16963646939e-16, cumulative = 2.08974311557e-05 smoothSolver: Solving for omega, Initial residual = 7.31631987399e-08, Final residual = 4.57762864183e-11, No Iterations 1 smoothSolver: Solving for k, Initial residual = 4.39226774226e-07, Final residual = 2.03583449134e-10, No Iterations 1 ExecutionTime = 29318.96 s ClockTime = 29376 s Courant Number mean: 1.18884127695e-06 max: 7.50169136387 Interface Courant Number mean: 3.0019195664e-08 max: 3.95459850554 deltaT = 8.24321301597e-153 Time = 67.132 PIMPLE: iteration 1 Updating StokesI wave model for patch inlet smoothSolver: Solving for alpha.water, Initial residual = 5.38393271075e-09, Final residual = 5.38393271075e-09, No Iterations 0 Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 MULES: Correcting alpha.water MULES: Correcting alpha.water Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 Updating shallowWaterAbsorption wave model for patch outlet DICPBiCGStab: Solving for p_rgh, Initial residual = 0.844175076514, Final residual = 0.00539645720402, No Iterations 20 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.742024848316, Final residual = 0.00733560856723, No Iterations 27 time step continuity errors : sum local = 1.16277362766e-09, global = -5.78716682763e-10, cumulative = 2.08968524391e-05 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.824114713535, Final residual = 0.00803020015335, No Iterations 25 DICPBiCGStab: Solving for p_rgh, Initial residual = 0.867366339743, Final residual = 9.11722968482e-10, No Iterations 373 time step continuity errors : sum local = 8.95106772158e-16, global = -5.97636368108e-16, cumulative = 2.08968524385e-05 smoothSolver: Solving for omega, Initial residual = 7.30573956466e-08, Final residual = 4.54407875238e-11, No Iterations 1 smoothSolver: Solving for k, Initial residual = 4.38607733913e-07, Final residual = 2.03320386843e-10, No Iterations 1 ExecutionTime = 29358.38 s ClockTime = 29416 s Courant Number mean: 1.18886725019e-06 max: 7.50212848379 Interface Courant Number mean: 3.00241095746e-08 max: 3.95487860459 deltaT = 1.09878323649e-153 Time = 67.132 PIMPLE: iteration 1 Updating StokesI wave model for patch inlet smoothSolver: Solving for alpha.water, Initial residual = 5.38400281089e-09, Final residual = 5.38400281089e-09, No Iterations 0 Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 MULES: Correcting alpha.water MULES: Correcting alpha.water Phase-1 volume fraction = 0.666618301469 Min(alpha.water) = -2.29205431887e-10 Max(alpha.water) = 1.00000001308 Updating shallowWaterAbsorption wave model for patch outlet -------------------------------------------------------------------------- Primary job terminated normally, but 1 process returned a non-zero exit code. Per user-direction, the job has been aborted. -------------------------------------------------------------------------- -------------------------------------------------------------------------- mpirun detected that one or more processes exited with non-zero status, thus causing the job to be terminated. The first process to do so was: Process name: [[8254,1],7] Exit code: 145 --------------------------------------------------------------------------

在粗网格和中等网格却计算很稳定。根据https://cfd-china.com/topic/5462/mpirun-detected-that-one-or-more-processes-exited-with-non-zero-status，尝试修改了fvSolution，但依旧迭代不出来，请问您有什么解决办法吗

@bestucan 不太懂这个，就是用google浏览器打开网页，之前都没问题，最近突然出现这种打不开的情况。:136:

@黄昏晓为谁破 好的感谢前辈回复

请问我想使用dpm模型模拟液滴的凝固，应该选什么类型得到颗粒呢？我看几种类型的粒子没有考虑凝固过程，求教！！！

我这边需要仿真一个构件在烘箱中逐渐被加热的过程，结构非常简单，就是一个构件周围用壁面包裹，其截面如下图所示。
IGBT fixture-温度2.jpg
四周壁面设定为固定温度358K，初始温度为293K。由于工作中计算资源有限，且目前只需要定性得到构件各部位升温的快慢情况，因此仿真时只打开了能量方程，上图就是仿真至380秒左右时的状态。

然后在仿真中，初始的时间步长是0.001s，因为太小了导致仿真进度比较慢，而且能量方程的残差一直保持在10e-7级别，我这边通过不断地放大时间步长，至380s时时间步长为0.1s，至400s左右时时间步长改为1s。在这个过程中，我发现每次增大时间步长，监测点的温升曲线斜率都会变小，也就是说温升变慢了，比如下图就是时间步长由0.1s改为1s时，监测点温升情况的变化：
IGBT fixture-温升.jpg

在我更改时间步长的过程中，方程的残差均保持在10e-7级别，那么我想知道，温升速率为什么会因为时间步长的增加而变小呢？是不是因为网格不够精细造成的，因为为了快速出结果，网格确实比较粗糙，还是说还有其他可能的因素？谢谢大家了

@刀尔東 在 向各位大佬请教一下网格划分的基础问题 中说：

感谢各位大佬不吝赐教。

链接: https://pan.baidu.com/s/11z9O_mzDLuqEp30mWRr5Ow?pwd=1234 提取码: 1234 复制这段内容后打开百度网盘手机App，操作更方便哦
--来自百度网盘超级会员v6的分享

以上是我的两个文件

网格文件为ENSIGHT GOLD FORMAT

我感觉有必要擦除流体与固体的试算结果，再进入下一个迭代步。固体好说，只有一个D，我令D=D.oldTime();就能把D的试算结果消去，但流体就很麻烦，因为有很多个变量，我试了半天也不知道该怎么把所有变量的值都擦除掉，恢复迭代前的值

没太看明白

https://cfd-china.com/topic/3742/结构化网格/8?_=1615050206338
倒数第二个帖子

HTML文件，内容如下

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<span class="timeago" title="{posts.timestampISO}"></span> </small> </a> </li> <!-- IF !@last --> <li role="separator" class="divider"></li> <!-- ENDIF --> {{{end}}} <!-- IF multiplePages --> <li class="text-center"> <a href="{url}"> [[search:see-more-results, {matchCount}]] </a> </li> <!-- ENDIF multiplePages --> </ul> </div> <!-- IF isTopic --> <div class="category-list-container hidden-sm hidden-xs"></div> <!-- ENDIF isTopic --> <div class="pull-right draft-icon hidden-xs hidden-sm"></div> <div class="btn-group pull-right action-bar hidden-sm hidden-xs"> <button class="btn btn-default composer-discard" data-action="discard" tabindex="-1"><i class="fa fa-times"></i> [[topic:composer.discard]]</button> <button class="btn btn-primary composer-submit" data-action="post" tabindex="6"><i class="fa fa-check"></i> [[topic:composer.submit]]</button> </div> </div> <div class="category-tag-row"> <div class="btn-toolbar formatting-bar"> <ul class="formatting-group"> <!-- BEGIN formatting --> <!-- IF formatting.spacer --> <li class="spacer"></li> <!-- ELSE --> <!-- IF !formatting.mobile --> <li tabindex="-1" data-format="{formatting.name}" title="{formatting.title}"><i class="{formatting.className}"></i></li> <!-- ENDIF !formatting.mobile --> <!-- ENDIF formatting.spacer --> <!-- END formatting --> <!--[if gte IE 9]><!--> <!-- IF privileges.upload:post:image --> <li class="img-upload-btn hide" data-format="picture" tabindex="-1" title="[[modules:composer.upload-picture]]"> <i class="fa fa-file-image-o"></i> </li> <!-- ENDIF privileges.upload:post:image --> <!-- IF privileges.upload:post:file --> <li class="file-upload-btn hide" data-format="upload" tabindex="-1" title="[[modules:composer.upload-file]]"> <span class="fa-stack"> <i class="fa fa-file-o fa-stack-1x"></i> <i class="fa fa-arrow-up fa-stack-1x"></i> </span> </li> <!-- ENDIF privileges.upload:post:file --> <!--<![endif]--> <!-- IF allowTopicsThumbnail --> <li tabindex="-1"> <i class="fa fa-th-large topic-thumb-btn topic-thumb-toggle-btn hide" title="[[topic:composer.thumb_title]]"></i> </li> <div class="topic-thumb-container center-block hide"> <form id="thumbForm" method="post" class="topic-thumb-form form-inline" enctype="multipart/form-data"> <img class="topic-thumb-preview"></img> <div class="form-group"> <label for="topic-thumb-url">[[topic:composer.thumb_url_label]]</label> <input type="text" id="topic-thumb-url" class="form-control" placeholder="[[topic:composer.thumb_url_placeholder]]" /> </div> <div class="form-group"> <label for="topic-thumb-file">[[topic:composer.thumb_file_label]]</label> <input type="file" id="topic-thumb-file" class="form-control" /> </div> <div class="form-group topic-thumb-ctrl"> <i class="fa fa-spinner fa-spin hide topic-thumb-spinner" title="[[topic:composer.uploading]]"></i> <i class="fa fa-times topic-thumb-btn hide topic-thumb-clear-btn" title="[[topic:composer.thumb_remove]]"></i> </div> </form> </div> <!-- ENDIF allowTopicsThumbnail --> <form id="fileForm" method="post" enctype="multipart/form-data"> <!--[if gte IE 9]><!--> <input type="file" id="files" name="files[]" multiple class="gte-ie9 hide"/> <!--<![endif]--> <!--[if lt IE 9]> <input type="file" id="files" name="files[]" class="lt-ie9 hide" value="Upload"/> <![endif]--> </form> </ul> </div> </div> <div class="row write-preview-container"> <div class="write-container"> <div class="help-text"> <span class="help hidden">[[modules:composer.compose]] <i class="fa fa-question-circle"></i></span> <span class="toggle-preview hide">[[modules:composer.show_preview]]</span> </div> <div class="pull-right draft-icon hidden-md hidden-lg"></div> <textarea class="write" tabindex="4"></textarea> </div> <div class="hidden-sm hidden-xs preview-container"> <div class="help-text"> <span class="toggle-preview">[[modules:composer.hide_preview]]</span> </div> <div class="preview well"></div> </div> </div> <!-- IF isTopicOrMain --> <div class="tag-row"> <div class="tags-container"> <div class="btn-group dropup <!-- IF !tagWhitelist.length -->hidden<!-- ENDIF !tagWhitelist.length -->" component="composer/tag/dropdown"> <button class="btn btn-default dropdown-toggle" data-toggle="dropdown" type="button"> <span class="visible-sm-inline visible-md-inline visible-lg-inline"><i class="fa fa-tags"></i></span> <span class="caret"></span> </button> <ul class="dropdown-menu"> <!-- BEGIN tagWhitelist --> <li data-tag="@value"><a href="#">@value</a></li> <!-- END tagWhitelist --> </ul> </div> <input class="tags" type="text" class="form-control" placeholder="[[tags:enter_tags_here, {minimumTagLength}, {maximumTagLength}]]" tabindex="5"/> </div> </div> <!-- ENDIF isTopicOrMain --> <!-- IF isTopic --> <ul class="category-selector visible-xs visible-sm"> </ul> <!-- ENDIF isTopic --> <div class="imagedrop"><div>[[topic:composer.drag_and_drop_images]]</div></div> <div class="resizer"><div class="trigger text-center"><i class="fa"></i></div></div> </div> </div>

@XIN 请问您解决了吗，我也遇到这个问题了

我最近也碰到这个问题，单核计算时对某个特定的patch上的面心可以赋值，但并行分块之后也是运行不了。

这个潘工的联系方式给我呀，500块买不了上当啊

@李东岳 好的 感谢东岳老师