Can someone help me fix the COMSOL error below?

Hamid Dehkordi @Hamid-Dehkordi

02 November 2016 1 2K Report

When I am solving a fluidized bed reactor without reaction. I found this error:

Undefined value found.

- Detail: NaN or Inf found when solving linear system using Vanka.

can someone help me on that?

Hitesh Kumar Sharma

I think you should change the flow rate of fluid which you are using in simulation as well the viscosity of the fluid and try to get the results.

Badges
Science topic

More Hamid Dehkordi's questions See All

Is there any expert in Smart PLS who can help me?

Dear colleagues, I have a manuscript that needs an expert in smart PLS to run the analysis, Is there anyone expert and ready to help me, please?

01 March 2021 8,212 3 View

How is the repeatability interpreted in agreement subject?

Dear Researchers, In a study, we assessed the agreement between two tools. At first, we used Bland-Altman plot. Then we calculated Repeatability Coefficient. Mean Difference (sd): 0.827...

30 January 2021 236 1 View

send me MATLAB code to solve the equations of pumps and signals transactions of Raman amplifier,Please?

Please send me MATLAB code to solve the equations of pumps and signals transactions of Raman amplifier

05 January 2021 283 2 View

Can anyone help with creating treshold variable in tvarx toolbox by gabriel bruneau.?

Dear all, please can anyone help me with how to create the threshold variable array in the Matlab tvarx tool box by Gabriel Bruneau..I have tried all so many ways but I kept getting an error..

01 January 2021 3,757 3 View

In the synthesis of IrO2@TiO2 are IrCl3.xH2O and H2IrCl6 salts replaceable?

I have IrCl3.xH2O salt, but most papers have used H2IrCl6 for synthesis. Has anyone had any experience with this?

24 December 2020 8,145 3 View

How can estimate the Abaqus chaboche parameters from hysteresis curve?

Hello To validate the results of modeling by Abaqus software with experimental results, how can estimate the Chaboche hardening coefficients from the hysteresis curve? The material is steel.

21 December 2020 2,999 3 View

Difference between electro-optical switches and modulators?

Hi Suppose an electro-optical structure that by applying an external voltage, the output light can be in the ON or OFF states. The structure has one input port and one output port. Now, Is this...

10 December 2020 8,276 7 View

What is the reason for the difference in the slope of the hysteresis curve in loading and unloading?

Hello I want to verify a hysteresis curve caused by laboratory results by Abaqus software. The slope of this curve varies in loading and unloading. While the simulation results have the same...

28 November 2020 5,446 9 View

How to calculate of Nonlinear Principal Component Analysis in MATLAB?

We seek to develop an aridity index using nonlinear relationships of climatic variables such as T, P, ET and etc.

23 November 2020 1,660 3 View

Why Hiden mass spectrometer shows wrong percentages after calibration?

Hello every one I was wondering if someone could help me solve the problem that I have with my Mass Spectrometer. Actually I have already calibrated my MS device for a mixture of 60% Ar and 40 %...

19 November 2020 2,984 3 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Is there any tutorial for comsol general projections?

Hi, im trying to make a projection in a 3d comsol model. I have a non uniforme chanel and my intention is to get the average tempreture in the y-z cross section and se the average tempreture...

02 March 2021 4,624 4 View

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Is it possible to do piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch?

How to do Piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch? Piezoelectric coupling between the rectangular substrate and rectangular...

02 March 2021 9,833 3 View

What analysis to choose with a large neste dataset and clearly skewed or kurtotic distributions?

Hello! I have a dataset of n=3000 nested within 8 countries with approximately 200 or 400 responses in each country. I originally planned to perform multilevel modelling with 4 dependent variables...

02 March 2021 6,865 1 View

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View

Which is suitable for use with Python? MySQL or SQL Server?

Which is suitable for use with Python? MySQL or SQL Server? What is your suggestion?

01 March 2021 3,422 3 View