{"id":389538,"date":"2024-10-14T16:33:56","date_gmt":"2024-10-14T16:33:56","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-model-mass-flow-rate-as-input-based-on-pressure-difference\/"},"modified":"2024-10-14T16:33:56","modified_gmt":"2024-10-14T16:33:56","slug":"how-to-model-mass-flow-rate-as-input-based-on-pressure-difference","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-model-mass-flow-rate-as-input-based-on-pressure-difference\/","title":{"rendered":"how to model mass flow rate as input based on pressure difference"},"content":{"rendered":"<p>&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;I would like to simulate the bladder inflation stage and determine the response time.&lt;\/span&gt;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; font-weight: bold; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;1. Inputs &lt;\/span&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;&ndash; Mass flow rate vs. pressure difference (density and temperature will remain constant&mdash;steady state over a longer duration, ideally with minimal thermodynamic effects).&lt;\/span&gt;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; font-weight: bold; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;2. Output &lt;\/span&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;&ndash; How long it will take to inflate.&lt;\/span&gt;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/14-10-2024-1728923531-mceclip0.png\" width=\"909\" height=\"289\" \/>&lt;\/span&gt;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;I am currently encountering two major issues while using the WANG_NEFSKE airbag card in conjunction with *INTERACTION for our simulations:&lt;\/span&gt;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; font-weight: bold; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;1.Mass Flow Rate Input: &lt;\/span&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;We are providing the mass flow rate per unit time to the pump, but we &lt;\/span&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;actually need&lt;\/span&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt; to specify the mass flow rate per unit area to accurately simulate the filling of the pump from the environment and maintain that supply.&lt;\/span&gt;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; font-weight: bold; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;2.Density and Temperature Variations: &lt;\/span&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;As mass enters the bladder, we are observing significant changes in density and temperature, which result in large discrepancies in displacement. Since our scenario is intended to be steady state, we aim to minimize these effects on displacement and volume.&nbsp;&lt;\/span&gt;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p style=&#8221;language: en-US; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0in; text-align: left; direction: ltr; unicode-bidi: embed; mso-line-break-override: none; word-break: normal; punctuation-wrap: hanging;&#8221;&gt;&lt;span style=&#8221;font-size: 12.0pt; font-family: Aptos; mso-ascii-font-family: Aptos; mso-fareast-font-family: +mn-ea; mso-bidi-font-family: +mn-cs; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-fareast; mso-bidi-theme-font: minor-bidi; color: black; mso-color-index: 1; mso-font-kerning: 12.0pt; language: en-US; mso-style-textfill-type: solid; mso-style-textfill-fill-themecolor: text1; mso-style-textfill-fill-color: black; mso-style-textfill-fill-alpha: 100.0%;&#8221;&gt;Please suggest how to simulate this field problem.&lt;\/span&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-389538","topic","type-topic","status-publish","hentry","topic-tag-LS-DYNAruntime-1","topic-tag-dynamic-pressure-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I would like\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-model-mass-flow-rate-as-input-based-on-pressure-difference\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta 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