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I can't understand that my modal analysis results about effective mass. Why does the effective mass in the direction of rot exceed the total mass?

hello, I'm student who study about modal analysis, I tried modal analysis to simple 1 floored model that have 4 legs. Total mass is almost 2kg. As a result of the analysis, the effective mass in...

31 March 2020 7,709 4 View

Why dose carbon of carbonic acid have a positive charge??

Dipole moment of carbonic acid is zero. However, when CO2 dissolves in water, (CO2+H2O->H2CO3) Carbon of CO2 is attacked by unshared eletron pair of H2O. Why????

07 March 2019 322 4 View

How to adjust p-values obtained by pairwise comparison of treatments, but I have multiple treatments?

My experiment have several treatments (e.g. A, B, and C). If I have interest in differentially expressed genes (DEGs) over all treatments, ANOVA will be good enough. However, my major focus is...

24 November 2017 9,855 4 View

I need to increase the critical thickness of silicon epitaxy at low temperature. What are the best ways to achieve this?

1. Silicon Epitaxy expert 2. D.J. Eaglesham 3. H.J. Gossmann

08 June 2016 6,469 2 View

How can I explain different effect of overexpression on exogenous end endogenous mRNA?

Recently, I've got very strange phenomena. When I transfected a plasmid expressing protein 'A' with a plasmid expressing reporter mRNAs, which harbor specific 3' UTR, into HeLa cells,...

25 November 2015 8,344 2 View

How can I extract nanorods from nanopores of anodic aluminum oxide?

i make nanorod in porous anodic aluminum oxide and then i removed Al2O3 to extract that rod. but, i found white precipitate after centrifuge which is not nanorod. how can i remove that?

13 April 2015 9,206 3 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View

How to approach CFD simulation results of a flow past a cylinder?

Hi all, I'm doing a transient simulation of flow past a rectangular cylinder close to the free surface. As far as I'm concerned, the common practice is to discard the initial stages of the...

25 February 2021 1,348 3 View

Error in comsol?

Dear respected researchers, while performing CFD analysis in Comsol it's showing like this Error: Nonlinear solver did not converge. The maximum number of Newton iterations reached can...

24 February 2021 249 3 View

How to overcome convergence issues in concrete arch models?

Hi, I have modelled a three-span arch bridge with soil fill over along with pedestals. The FE modelling is done in LUSAS with HX8M solid elements (i.e. 3D solid modelling). The non-linearity is...

20 February 2021 1,346 2 View

How to combine two geometries in LAMMPS ?

I am trying to simulate contact angle of water on a quartz slab using LAMMPS. I have created and equilibriated the quartz slab and the water cluster separately. Now I want to create a composite...

17 February 2021 5,884 2 View

Comsol Maximum number of Newton iterations reached?

Comsol is investigating deformation due to gravity. Gravity is applied to the nanosheets to check for displacement and stress. If I input the Young's modulus of the channel to about 1 [GPa], the...

15 February 2021 6,027 3 View

Why is my vc-relax computation of a W-based material is not converging? What important factors should I consider to attain convergence?

Here are some of the parts of the input file: &system ibrav = 0, nat= 9, ntyp= 2, ecutwfc = 36.7, ecutrho = 367, smearing = 'methfessel-paxton', occupations = 'smearing',...

10 February 2021 4,689 1 View

How to mesh complex geometry?

I have been trying to mesh some complex geometry and have been having issues. I have attached images of the geometry in question. This structure is very large in size but has some comparatively...

05 February 2021 6,379 5 View

How to conduct mesh sensitivity/convergence analysis in MSC Marc Mentat?

Currently using Msc Marc Mentat for FEA. Now i conduct the mesh convergence/sensitivity analysis manually. So I need to know if there any automatic way to conduct the mesh convergence/sensitivity...

04 February 2021 3,310 3 View

Please recommend me the proper steps (blocking method) to generate Hexahedral mesh of the following geometry inside ICEM-CFD?

I am facing an issue while blocking for the geometry mentioned in the image. After blocking it ends with a triangular block due to its shape. How to create a hexahedral mesh for this geometry in...

02 February 2021 888 1 View