{"id":2832,"date":"2019-05-04T01:39:35","date_gmt":"2019-05-03T23:39:35","guid":{"rendered":"https:\/\/cfdfeaservice.it\/?p=2832"},"modified":"2020-04-11T00:12:23","modified_gmt":"2020-04-10T22:12:23","slug":"calcolo-mesh-con-snappyhexmesh","status":"publish","type":"post","link":"https:\/\/test.cfdfeaservice.it\/index.php\/2019\/05\/04\/calcolo-mesh-con-snappyhexmesh\/","title":{"rendered":"Calcolo Mesh con snappyHexMesh"},"content":{"rendered":"\n<p>Ecco il primo di una serie di tools di calcolo sviluppati da <strong>CFD FEA SERVICE<\/strong>. Grazie al seguente tool di calcolo \u00e8 possibile dimensionare una mesh calcolata con <a rel=\"noreferrer noopener\" href=\"https:\/\/cfd.direct\/openfoam\/user-guide\/v6-snappyhexmesh\/\" target=\"_blank\">SnappyHexMesh <\/a>ottenendo informazioni riguardo il refinement da assegnare.<\/p>\n\n\n\n<p>Prima di darvi alcune istruzioni all&#8217;uso, vi rimandiamo anche alla sezione del blog dedicata ad <a href=\"https:\/\/cfdfeaservice.it\/index.php\/category\/cfd\/openfoam\/\">OpenFOAM<\/a> in cui sar\u00e0 possibile reperire informazioni e approfondimenti svolti riguardo <strong>OpenFOAM<\/strong> e i vari strumenti messi a disposizione da questo importante tool. Inoltre ricordiamo a tutti che offriamo una completa piattaforma di <a href=\"https:\/\/cfdfeaservice.it\/index.php\/cloud-hpc-cloud-computing\/\">cloud HPC<\/a> in cui \u00e8 possibile svolgere le vostre simulazioni sfruttando la potenza di calcolo di un cluster dedicato.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2>Istruzioni per SnappyHexMesh<\/h2>\n\n\n\n<p>Inserire i seguenti dati della simulazione:<\/p>\n\n\n\n<ul><li>U_inf -> velocit\u00e0 caratteristica in m\/s<\/li><li>Density -> densit\u00e0 in kg\/m3<\/li><li>Viscosity -> viscosit\u00e0 dinamica in Pa s<\/li><li>y+ -> risoluzione della mesh a parete<\/li><\/ul>\n\n\n\n<p>Da queste informazioni si ottiene l&#8217;altezza della prima cella a parete (firstLayerThickness) da inserire nel file <em>snappyHexMesh Dict<\/em>. Si prosegue quindi con i seguenti dati:<\/p>\n\n\n\n<ul><li>nSurfaceLayers -> numero di layer di celle estruse a parete<\/li><li>expansionRatio -> rapporto di altezze tra due layer adiacenti<\/li><li>finalLayerThickness -> altezza dell&#8217;ultimo strato a parete<\/li><\/ul>\n\n\n\n<p>Questi dati vanno inseriti ovviamente nel file <em>snappyHexMesh Dict<\/em> ed usati qui per ottenere le dimensioni delle celle castellated. Gli ultimi dati sono quindi il level (n. di refinement a parete) e la dimensione massima delle celle castellated, da utilizzare per definire <em>blockMeshDict<\/em>.<\/p>\n\n\n\n<form name=\"cp_calculatedfieldsf_pform_1\" id=\"cp_calculatedfieldsf_pform_1\" action=\"?\" method=\"post\" enctype=\"multipart\/form-data\" class=\"\"><input type=\"hidden\" name=\"cp_calculatedfieldsf_id\" value=\"6\" \/><pre style=\"display:none !important;\"><!--noptimize--><script>form_structure_1=[[{\"form_identifier\":\"\",\"name\":\"fieldname7\",\"shortlabel\":\"\",\"index\":0,\"ftype\":\"ffieldset\",\"userhelp\":\"\",\"userhelpTooltip\":false,\"csslayout\":\"\",\"fields\":[\"fieldname2\",\"fieldname3\",\"fieldname4\",\"fieldname5\",\"fieldname6\"],\"columns\":\"2\",\"title\":\"Simulation 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Starting from the y+ estimation, back to the blockMesh grid spacing definition.\",\"formlayout\":\"top_aligned\",\"persistence\":0,\"evalequationsevent\":\"1\",\"formtemplate\":\"\",\"evalequations\":1,\"autocomplete\":1,\"customstyles\":\"\"},\"formid\":\"cp_calculatedfieldsf_pform_1\"}];<\/script><!--\/noptimize--><\/pre>\r\n<div id=\"fbuilder\">\r\n  <div id=\"fbuilder_1\">\r\n      <div id=\"formheader_1\"><\/div>\r\n      <div id=\"fieldlist_1\"><\/div>\r\n  <\/div>\r\n<\/div>\r\n<div class=\"clearer\"><\/div>\r\n<\/form>\r\n\n<p><strong>_________________________________<\/strong><\/p>\n<p><strong>CFD FEA Service SRL<\/strong> &egrave; una societ&agrave; di servizi che offre <em>consulenza<\/em> e <em>formazione<\/em> in ambito <strong>ingegneria<\/strong> e <strong>IT<\/strong>. Se questo post\/prodotto ti &egrave; piaciuto ti invitiamo a:<\/p>\n<ul>\n<li>visionare il nostro <a href=\"https:\/\/cfdfeaservice.it\/index.php\/blog\/\" target=\"_blank\" rel=\"noopener\">blog<\/a><\/li>\n<li>visionare i <a href=\"https:\/\/cfdfeaservice.it\/index.php\/prodotti\/\" target=\"_blank\" rel=\"noopener\">software<\/a> disponibili - anche per la formazione<\/li>\n<li>iscriverti alla nostra newsletter<\/li>\n<li>entrare in contatto con noi attraverso la <a href=\"https:\/\/cfdfeaservice.it\/#ribbon\" target=\"_blank\" rel=\"noopener\">pagina contatti<\/a><\/li>\n<\/ul>\n<p>Saremo lieti di seguire le tue richieste e fornire risposte alle tue domande.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ecco il primo di una serie di tools di calcolo sviluppati da CFD FEA SERVICE. Grazie al seguente tool di calcolo \u00e8 possibile dimensionare una mesh calcolata con SnappyHexMesh ottenendo informazioni riguardo il refinement da assegnare. Prima di darvi alcune istruzioni all&#8217;uso, vi rimandiamo anche alla sezione del blog dedicata [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2834,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[30,33,66],"tags":[],"jetpack_featured_media_url":"https:\/\/i2.wp.com\/test.cfdfeaservice.it\/wp-content\/uploads\/2019\/05\/m7nSEhI.png?fit=1337%2C743&ssl=1","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Calcolo Mesh con snappyHexMesh - CFD FEA\/FEM Service<\/title>\n<meta name=\"description\" content=\"Tool di calcolo di una mesh per snappyHexMesh - OpenFOAM. Partendo dalla definizione delle grandezze fluidodinamiche, stima il refinement della mesh.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/test.cfdfeaservice.it\/index.php\/2019\/05\/04\/calcolo-mesh-con-snappyhexmesh\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Calcolo Mesh con snappyHexMesh - CFD FEA\/FEM Service\" \/>\n<meta property=\"og:description\" content=\"Tool di calcolo di una mesh per snappyHexMesh - OpenFOAM. 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