Simulation in COMSOL?

Hi. In simulation I faced with this error: Undefined variable. - Variable: comp1.solid.u_tx - Geometry: geom1 - Domains: 2-3, 19 Failed to evaluate Jacobian of expression. can anyone help me?

21 May 2018 6,200 3 View

How can I simulate the pipeline model to find leaks in MATLAB?

How can I leak detection pipeline in MATLAB

07 August 2017 371 6 View

Do you have any solution for speed up the scientific peer review process?

09 October 2016 7,651 10 View

What are the physical reasons beyond the sediment classification?

04 May 2016 300 0 View

How do you find papers, projects, thesis and etc in your study field?

02 March 2015 123 5 View

How can I create a rectangular domain with uniformly random packed circles with different diameters?

Hi,I want to create a rectangular domain (L*B) with a large number of circles (over 6000) within it. The circles have different diameters, d, in specific ranges (i.e. d_min

07 August 2014 7,596 5 View

How can I develop a fast MATLAB code?

Hi, I know that FORTAN is fast, whereas one of disadvantages of MATLAB is the problem of speed. Matlab code is interpreted during runtime. Languages like C and Fortran are faster because they are...

10 November 2013 9,255 25 View

Which open source CFD are more suitable for turbulence modeling (e.g. LES)?

Hi, I want to simulate the flow field with high resolution turbulence, especially near the wall region. Thanks for taking a look.

06 July 2013 1,440 7 View

No title

05 June 2013 3,342 2 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

How can I integrate a routing protocol in a tiny device (e.g. Raspberry Pi)?

Hi Community, I'm facing the issue of integration/compiling a new routing protocol in a WSN simulator. The final goal is to successfully add, configure this routing protocol in hardware devices...

01 March 2021 9,332 6 View

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 View

Timeout error!! Processor in the loop (PIL) using STM32F4 Matlab 2018a?

Dear Researchers I am trying to perform a PIL simulation using STM32F4 Discovery board and comunication serial USB TO TTL. During simulation I receive the following timeout error: An error...

01 March 2021 2,327 1 View

How to eliminate Steady state error from Reinforcement learning genetic algorithm code?

The following code (see 1st 2 images attached) is used to produce PID controller values that are designed to control the system (G). The code finds the PID controller values (noted as k) by using...

28 February 2021 6,560 14 View

How to prevent ANFIS Model from negative prediction values in MATLAB?

I have input and output data set for "ANFIS modeling in MATLAB", and I am getting some negative predicted values of output in testing. However, the predicted values of output in training are...

28 February 2021 3,459 3 View

How to improve and implement WBAN MAC and Radio modules under Castalia 3.2 ?

Hello researchers, Hello Castalia3.2 researchers I am a beginner with Castalia, I work on optimization of RFID systems used in wireless body networks. I simulated a WBAN with 10 nodes and one...

28 February 2021 400 1 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View

How to calculate Ligand-active site distance in a ligand-protein complex from MD simulation?

I have run a MD simulation of a ligand-protein complex in GROMACS using CHARMM forcefield. Reviewer has asked me to calculate Ligand-activesite distance and binding free energy of ligand with...

27 February 2021 4,703 1 View