{"id":11508,"date":"2026-02-28T11:20:17","date_gmt":"2026-02-28T11:20:17","guid":{"rendered":"https:\/\/edrmedeso.com\/?post_type=article&#038;p=11508"},"modified":"2026-04-08T14:08:35","modified_gmt":"2026-04-08T13:08:35","slug":"when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems","status":"publish","type":"article","link":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/","title":{"rendered":"When to Use SALE: Practical LS-DYNA Insights for FSI Problems"},"content":{"rendered":"<h2>Fluid\u2011structure interaction (FSI) problems often sit at the most challenging end of simulation. Fast\u2011moving fluids, deforming structures, and highly transient events push both modelling approaches and solver performance to their limits.<\/h2>\n<h2>In this blog, EDRMedeso specialists address common and practical questions about SALE (Structured Arbitrary Lagrangian\u2011Eulerian) methods in <a href=\"https:\/\/edrmedeso.com\/products\/ansys-ls-dyna\/\">LS\u2011DYNA<\/a>, focusing on when SALE is the right choice, how it compares to other FSI approaches, and what engineers should pay attention to when validating results.<\/h2>\n<hr \/>\n<h2><\/h2>\n<h2>Why engineers turn to SALE in the first place<\/h2>\n<p>SALE methods combine aspects of both Lagrangian and Eulerian formulations, making them well suited to problems where large fluid motion interacts with structures over short time scales.<\/p>\n<p>Unlike fully implicit FSI approaches, SALE uses explicit time integration, which makes it particularly effective for:<\/p>\n<ul>\n<li>High\u2011energy events<\/li>\n<li>Rapid transients<\/li>\n<li>Short\u2011duration phenomena<\/li>\n<\/ul>\n<p>This is why SALE is often considered for impact\u2011like or highly dynamic fluid\u2011structure problems where traditional approaches may struggle with stability or computational cost.<\/p>\n<p>&nbsp;<\/p>\n<h2><strong>Validation still matters &#8211; even with advanced methods<\/strong><\/h2>\n<p>One of the key messages is clear: advanced methods do not remove the need for careful validation.<\/p>\n<p>The same principles used in other simulations still apply:<\/p>\n<ul>\n<li>Energy conservation should be checked<\/li>\n<li>Reaction forces should be monitored<\/li>\n<li>Overall physical behaviour should make sense<\/li>\n<\/ul>\n<p>For FSI problems, the experts also highlighted the importance of leakage checks. If material is allowed to flow out of the domain and no ALE boundary conditions are applied, apparent energy loss can occur. Leakage\u2011related quantities can be evaluated using <em>DATABASE_FSI<\/em> outputs, such as gx, gy, and gz.<\/p>\n<p>Where measurement data is available, comparing simulation results with experimental data remains one of the most effective validation approaches.<\/p>\n<p>&nbsp;<\/p>\n<h2><strong>Can SALE be used for rotating objects in water?<\/strong><\/h2>\n<p>This is a common and very practical question.<\/p>\n<p>SALE can be applied to rotating objects in water that are subsequently stopped, including cases where added mass, damping, and structural stresses are of interest. However, it&#8217;s important to note that the initialisation is critical.<\/p>\n<p>Engineers are advised to:<\/p>\n<ul>\n<li>Establish a steady\u2011state flow solution first<\/li>\n<li>Then perform the stopping or transient event simulation<\/li>\n<\/ul>\n<p>Even with correct setup, these simulations can become computationally expensive. In some cases, ICFD may be a more efficient alternative, depending on the problem goals.<\/p>\n<p>&nbsp;<\/p>\n<h2><strong>SALE vs traditional FSI: not a competition<\/strong><\/h2>\n<p>Another important clarification is that SALE is not a replacement for all FSI methods.<\/p>\n<p>In practice, SALE should be viewed as complementary to:<\/p>\n<ul>\n<li>FSI with LS\u2011DYNA Implicit and ICFD<\/li>\n<li>Coupled approaches using Ansys Mechanical and Ansys Fluent<\/li>\n<\/ul>\n<p>SALE excels in scenarios where explicit time integration and short\u2011term dynamics dominate. For longer\u2011duration or quasi\u2011static problems, other methods may be more appropriate. Choosing the right approach is ultimately about efficiency, robustness, and the specific physics being studied.<\/p>\n<p>&nbsp;<\/p>\n<h2><strong>Tool availability and practical adoption<\/strong><\/h2>\n<p>The current status of tool availability within the Ansys ecosystem is that SALE capabilities have been introduced gradually in Ansys Mechanical, with early exposure in 24R2 and more complete mesh workflows implemented in 2025R2. Further improvements are expected in subsequent releases.<\/p>\n<p>For engineers, this means SALE workflows are becoming increasingly accessible, but understanding when and how to use them remains essential!<\/p>\n<p>&nbsp;<\/p>\n<blockquote>\n<h2><strong>The key takeaway<\/strong><\/h2>\n<p>SALE methods in LS\u2011DYNA are powerful tools for solving demanding fluid\u2011structure interaction problems, especially those involving fast, high\u2011energy events. Their real value emerges when engineers understand both their strengths and their limitations.<\/p>\n<p>Used in the right context, SALE provides insight that would otherwise be difficult (maybe impossible) to obtain. Used without careful validation or problem selection, it can add unnecessary complexity. As with all advanced simulation techniques, success lies in choosing the right tool for the right problem.<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p><a class=\"btn icon-border-right-arrow text-primary mobile-btn title-block-button\" href=\"https:\/\/edrmedeso.com\/video\/coffee-with-an-expert-ls-dyna-setting-up-sale-models-in-ansys-mechanical\/\">Watch our on-demand webinar &#8216;Setting Up Sale Models in Ansys Mechanical&#8217;<\/a><\/p>\n<p>&nbsp;<\/p>\n<p><a class=\"btn icon-border-right-arrow text-primary mobile-btn title-block-button\" href=\"https:\/\/edrmedeso.com\/products\/ansys-ls-dyna\/\">Find out more about LS-DYNA<\/a><\/p>\n<p>&nbsp;<\/p>\n<p><a class=\"btn icon-border-right-arrow text-primary mobile-btn title-block-button\" href=\"https:\/\/edrmedeso.com\/products\/ansys-mechanical\/\">Find out more about Ansys Mechanical<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SALE methods are powerful. But only when applied to the right problems. Our expert explains when and why SALE makes sense for FSI simulations.<\/p>\n","protected":false},"featured_media":11329,"parent":0,"menu_order":0,"template":"","class_list":["post-11508","article","type-article","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>When to Use SALE: Practical LS DYNA Insights for FSI Problems<\/title>\n<meta name=\"description\" content=\"Learn when SALE methods in LS DYNA are the right choice for fluid structure interaction and when other FSI approaches may be more efficient.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When to Use SALE: Practical LS DYNA Insights for FSI Problems\" \/>\n<meta property=\"og:description\" content=\"Learn when SALE methods in LS DYNA are the right choice for fluid structure interaction and when other FSI approaches may be more efficient.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/\" \/>\n<meta property=\"og:site_name\" content=\"EDRMedeso\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/edrmedeso\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-08T13:08:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/edrmedeso.com\/wp-content\/uploads\/2026\/02\/AdobeStock_461599500-scaled.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1453\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@EDRMedeso\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/article\\\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\\\/\",\"url\":\"https:\\\/\\\/edrmedeso.com\\\/article\\\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\\\/\",\"name\":\"When to Use SALE: Practical LS DYNA Insights for FSI Problems\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/article\\\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/article\\\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/edrmedeso.com\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/AdobeStock_461599500-scaled.jpeg\",\"datePublished\":\"2026-02-28T11:20:17+00:00\",\"dateModified\":\"2026-04-08T13:08:35+00:00\",\"description\":\"Learn when SALE methods in LS DYNA are the right choice for fluid structure interaction and when other FSI approaches may be more efficient.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/article\\\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\\\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/edrmedeso.com\\\/article\\\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/article\\\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\\\/#primaryimage\",\"url\":\"https:\\\/\\\/edrmedeso.com\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/AdobeStock_461599500-scaled.jpeg\",\"contentUrl\":\"https:\\\/\\\/edrmedeso.com\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/AdobeStock_461599500-scaled.jpeg\",\"width\":2560,\"height\":1453,\"caption\":\"engineer working on simulation\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/article\\\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/edrmedeso.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"When to Use SALE: Practical LS-DYNA Insights for FSI Problems\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/#website\",\"url\":\"https:\\\/\\\/edrmedeso.com\\\/\",\"name\":\"EDRMedeso\",\"description\":\"People Enabling Innovation\",\"publisher\":{\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/edrmedeso.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/#organization\",\"name\":\"EDRMedeso\",\"url\":\"https:\\\/\\\/edrmedeso.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/edrmedeso.com\\\/wp-content\\\/uploads\\\/2023\\\/03\\\/cropped-EDR-Favicon-15.png\",\"contentUrl\":\"https:\\\/\\\/edrmedeso.com\\\/wp-content\\\/uploads\\\/2023\\\/03\\\/cropped-EDR-Favicon-15.png\",\"width\":512,\"height\":512,\"caption\":\"EDRMedeso\"},\"image\":{\"@id\":\"https:\\\/\\\/edrmedeso.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/edrmedeso\",\"https:\\\/\\\/x.com\\\/EDRMedeso\",\"https:\\\/\\\/www.instagram.com\\\/edrmedeso_simulation\\\/\",\"https:\\\/\\\/www.youtube.com\\\/@EDRMedeso\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/edrmedeso\\\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"When to Use SALE: Practical LS DYNA Insights for FSI Problems","description":"Learn when SALE methods in LS DYNA are the right choice for fluid structure interaction and when other FSI approaches may be more efficient.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/","og_locale":"en_GB","og_type":"article","og_title":"When to Use SALE: Practical LS DYNA Insights for FSI Problems","og_description":"Learn when SALE methods in LS DYNA are the right choice for fluid structure interaction and when other FSI approaches may be more efficient.","og_url":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/","og_site_name":"EDRMedeso","article_publisher":"https:\/\/www.facebook.com\/edrmedeso","article_modified_time":"2026-04-08T13:08:35+00:00","og_image":[{"width":2560,"height":1453,"url":"https:\/\/edrmedeso.com\/wp-content\/uploads\/2026\/02\/AdobeStock_461599500-scaled.jpeg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_site":"@EDRMedeso","twitter_misc":{"Estimated reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/","url":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/","name":"When to Use SALE: Practical LS DYNA Insights for FSI Problems","isPartOf":{"@id":"https:\/\/edrmedeso.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/#primaryimage"},"image":{"@id":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/#primaryimage"},"thumbnailUrl":"https:\/\/edrmedeso.com\/wp-content\/uploads\/2026\/02\/AdobeStock_461599500-scaled.jpeg","datePublished":"2026-02-28T11:20:17+00:00","dateModified":"2026-04-08T13:08:35+00:00","description":"Learn when SALE methods in LS DYNA are the right choice for fluid structure interaction and when other FSI approaches may be more efficient.","breadcrumb":{"@id":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/"]}]},{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/#primaryimage","url":"https:\/\/edrmedeso.com\/wp-content\/uploads\/2026\/02\/AdobeStock_461599500-scaled.jpeg","contentUrl":"https:\/\/edrmedeso.com\/wp-content\/uploads\/2026\/02\/AdobeStock_461599500-scaled.jpeg","width":2560,"height":1453,"caption":"engineer working on simulation"},{"@type":"BreadcrumbList","@id":"https:\/\/edrmedeso.com\/article\/when-to-use-sale-practical-ls-dyna-insights-for-fsi-problems\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/edrmedeso.com\/"},{"@type":"ListItem","position":2,"name":"When to Use SALE: Practical LS-DYNA Insights for FSI Problems"}]},{"@type":"WebSite","@id":"https:\/\/edrmedeso.com\/#website","url":"https:\/\/edrmedeso.com\/","name":"EDRMedeso","description":"People Enabling Innovation","publisher":{"@id":"https:\/\/edrmedeso.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/edrmedeso.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":"Organization","@id":"https:\/\/edrmedeso.com\/#organization","name":"EDRMedeso","url":"https:\/\/edrmedeso.com\/","logo":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/edrmedeso.com\/#\/schema\/logo\/image\/","url":"https:\/\/edrmedeso.com\/wp-content\/uploads\/2023\/03\/cropped-EDR-Favicon-15.png","contentUrl":"https:\/\/edrmedeso.com\/wp-content\/uploads\/2023\/03\/cropped-EDR-Favicon-15.png","width":512,"height":512,"caption":"EDRMedeso"},"image":{"@id":"https:\/\/edrmedeso.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/edrmedeso","https:\/\/x.com\/EDRMedeso","https:\/\/www.instagram.com\/edrmedeso_simulation\/","https:\/\/www.youtube.com\/@EDRMedeso","https:\/\/www.linkedin.com\/company\/edrmedeso\/"]}]}},"_links":{"self":[{"href":"https:\/\/edrmedeso.com\/wp-json\/wp\/v2\/article\/11508","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/edrmedeso.com\/wp-json\/wp\/v2\/article"}],"about":[{"href":"https:\/\/edrmedeso.com\/wp-json\/wp\/v2\/types\/article"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/edrmedeso.com\/wp-json\/wp\/v2\/media\/11329"}],"wp:attachment":[{"href":"https:\/\/edrmedeso.com\/wp-json\/wp\/v2\/media?parent=11508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}