{"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 style=”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;”><span style=”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%;”>I would like to simulate the bladder inflation stage and determine the response time.<\/span><\/p><p style=”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;”> <\/p><p style=”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;”><span style=”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%;”>1. Inputs <\/span><span style=”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%;”>– Mass flow rate vs. pressure difference (density and temperature will remain constant—steady state over a longer duration, ideally with minimal thermodynamic effects).<\/span><\/p><p style=”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;”> <\/p><p style=”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;”><span style=”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%;”>2. Output <\/span><span style=”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%;”>– How long it will take to inflate.<\/span><\/p><p style=”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;”> <\/p><p style=”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;”><span style=”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%;”><\/span><\/p><p style=”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;”> <\/p><p style=”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;”><span style=”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%;”>I am currently encountering two major issues while using the WANG_NEFSKE airbag card in conjunction with *INTERACTION for our simulations:<\/span><\/p><p style=”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;”> <\/p><p style=”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;”><span style=”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%;”>1.Mass Flow Rate Input: <\/span><span style=”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%;”>We are providing the mass flow rate per unit time to the pump, but we <\/span><span style=”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%;”>actually need<\/span><span style=”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%;”> to specify the mass flow rate per unit area to accurately simulate the filling of the pump from the environment and maintain that supply.<\/span><\/p><p style=”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;”> <\/p><p style=”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;”><span style=”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%;”>2.Density and Temperature Variations: <\/span><span style=”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%;”>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. <\/span><\/p><p style=”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;”> <\/p><p style=”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;”><span style=”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%;”>Please suggest how to simulate this field problem.<\/span><\/p><\/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":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["54970","13694"],"_bbp_author_ip":["74.83.172.202"],"_btv_view_count":["818"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["389538"],"_bbp_forum_id":["27814"],"_bbp_engagement":["13694","54970"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["390250"],"_bbp_last_active_id":["390250"],"_bbp_last_active_time":["2024-10-17 13:20:03"]},"test":"luis-pusey-alvaradogentherm-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/389538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/389538\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=389538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}