How to apply a voltage sinusoidal/harmonic load in ANSYS APDL?

Hello all, I want to simulate a Dielectric Elastomer Actuator DAE (an electrostatic-Structural analysis). I want to apply various voltages and frequencies into the DEA in the form of sine wave....

13 February 2021 3,261 3 View

Warning in Lavaan, variance-covariance not positive definite!, model is not identified?

Dear colleagues, I am new to R, I have been using Amos for conducting CFA but came to learn that when dealing with Likert scale, Lavaan in R is a better tool to do such analysis. I started using...

30 December 2020 5,608 3 View

Samples of survey questions?

24 May 2020 7,998 3 View

How to identify Microplastic polymers extracted from biota samples ?

It is suggested that FTIR or Raman spectroscopy is quiet useful to identify Microplastics extracted from samples. But when fibers are microscopic in size , then technical issues rises. For FTIR, a...

08 January 2020 1,312 4 View

How do I quantify the level of reactive oxidative stress in arthropods?

I will like to determine the level of various reactive oxygen species produced from ticks as part of an experiment. Considering the unstable nature of different ROS and their ability to dissociate...

08 January 2020 3,773 3 View

Does it possible to use health institution antibiogram for another health institution in the same city?

I have inquiry about using the results of antibiogram and its antibiotic policies in certain health institution interchangeably with another health institution in the same city or every health...

19 September 2019 7,708 8 View

Help with COMSOL Multiphysics?

Please can anyone help with COMSOL. I am trying to simulate gas storage in a porous media but I am at a loss on how to go about it especially how to input my mass balance, momentum and energy...

30 July 2019 1,453 2 View

How to use SmartPls for structural equation modeling?

I want to conduct partial least squares structural equation modeling for my research in SmartPls software . So, is there anyone who provides me the step by step guide of conducting SmartPls...

28 May 2019 3,292 4 View

An excel question; how to select different cells that are in one column among thousands of cells?

20 January 2019 5,001 2 View

Can ANSYS solve on multiple geometries at the same time?

I have 30 different geometries that will be subjected to the same fluid flow physics. Can i solve all at the same time in ANSYS workbench instead of each separately?

01 July 2018 9,685 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

Can we distinguish the type of free fluid inside the pelvic and abdominal cavities whether blood or serous fluid using the ultrasound?

during ultrasound examination of acute abdomen, sometimes we see free fluid , can we know the type of fluid ,whether blood or not , using ultrasound only? if yes , what are the sonographic...

01 March 2021 7,476 4 View

How much pressure we can reduce at the outlet to avoid Reverse Flow?

I am simulating Heat Exchanger. I have tried and tested all the methods to resolve this issue from the internet like refining mesh, improving skewness and orthogonal quality ,extending outlet to...

01 March 2021 6,985 3 View

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

How to increase mesh quality of a cfd model in ansys fluent?

How can one improve mesh skewness, orthogonality, aspect ratio?

28 February 2021 7,730 3 View

How the wettability of rock sample can be changed by ageing in pure hydrocarbon oils only?

I want to do wettability analysis of hydrocarbon oil (octane)/rock/surfactant solution system. but to do the analysis first I have to make rock surface oil-wet. Since hydrocarbon oil does not have...

27 February 2021 5,383 3 View

No title

I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...

25 February 2021 2,615 3 View

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

Is the a way to contol flow (Flow velocity) without impacting pressure value?

I have a pipe with 10 mm in Diameter and 2 bar pressure, the fluid velocity is 200 m/s, the fluid is air. is there a way to reduce velocity without affecting the pressure value?

25 February 2021 7,187 3 View