--- title: BOSfluids 8.1 release user day --- [![DRG\_Logo\_Large\_Dark-1](https://info.dynaflow.com/hs-fs/hubfs/DRG_Logo_Large_Dark-1.png?width=100&height=100&name=DRG_Logo_Large_Dark-1.png "DRG_Logo_Large_Dark-1")](https://dynaflow.com/) # BOSfluids 8.1 release user day One hour with the development team on what has changed in 8.1 and how each new capability is set up in a piping model. Three identical sessions, one on each time zone. USER DAY **29 September 2026** RELEASE DATE **7 October 2026** FORMAT **60 minutes online, questions included** ## Pick a session The same content runs three times on 29 September 2026. Sessions are held on ClickMeeting; you will receive the joining link by email. ## 08:00 to 09:00  29 September 2026 Suited to the Middle East and Asia [Reserve this seat](https://dynaflowresearchgroup.clickmeeting.com/bosfluids-8-1-release-user-day-session-1/register) ## 15:00 to 16:00 29 September 2026 Suited to Europe and Africa [Reserve this seat](https://dynaflowresearchgroup.clickmeeting.com/bosfluids-8-1-release-user-day-session-2/register) ## 19:00 to 20:00 29 September 2026 Suited to the Americas [Reserve this seat](https://dynaflowresearchgroup.clickmeeting.com/bosfluids-8-1-release-user-day-session-3/register) ## What is in 8.1 The session works through each of these in the software, using a live model rather than slides. #### Steady state thermal analysis The steady state solver solves the coupled flow and thermal equations, with four heat transfer models per pipe element: adiabatic, fluid, soil and custom. Thermal analyses require a separate licence option. #### Non-Newtonian liquids and drag reducing agents Four viscosity models, Newton, Power Law, Bingham Plastic and Herschel-Bulkley, supported in every analysis type, with a curve fit window to set the parameters from measurement data. #### Element limits and limit alerts Pressure, flow rate and flow velocity limits on pipe elements, deluge nozzles and sprinklers, checked against the results and listed in the new "Limit Alerts" report. #### Batch plot generator A series of similar plots across selected cases, data sets, nodes, elements and groups, saved as individual images or as one HTML or PDF document. #### Acoustic induced vibration assessment AIV assessments run from the steady state analysis to the Energy Institute or NORSOK guidelines, with an "Acoustic Fatigue Assessment" report and new sound power level and likelihood of failure data sets. #### Extended pump model Five operating modes including startup and controlled, an NPSHR curve with a warning when the available NPSH drops below it, and NPSHA as a data set and in the steady state solution report. #### Gas flow through inline restrictions Density through valves and orifice plates is no longer assumed constant, and sub-critical and critical flow are both accounted for, which also improves the AIV assessment. #### Model viewer and reporting Results as textual labels and captions in the viewer, element and node annotations, element groups shown as colours, and two reports for flow-dependent transient events. Also in this release: the tank and tube rupture elements extended, mass flow boundary conditions, templates in the components database, controllers connected to flow boundary conditions, and restraint forces and moments in combined flow and structural analyses.  Dynaflow Research Group, 2026 [mailto:info@dynaflow.com](mailto:info@dynaflow.com)