Is there anybody working on the oxygen mass transfer in cell cultures in a stirred tank bioreactor?

I have been working on cell cultures in stirred tank reactors. I want to know how to calculate the kLa (oxygen mass transfer coefficient) in such cases where we are growing cells inside the...

09 October 2018 2,157 5 View

How to improve the mesh quality of a stirred tank reactor?

I am simulating a stirred tank reactor using CFD. I meshed it, but the mesh quality is not good. How can I improve it. Can any one please help.

03 April 2018 9,543 4 View

How do we calculate the kLa for the cell culture, while changing the agitation rate inside the reactor?

Suppose we are growing the cells inside the reactor, we start with a fresh inoculum. How can we calculate the kLa inside the reactor, while changing the agitation rate (RPM). Ca anyone please...

02 March 2018 1,057 2 View

How can one exactly calculate the volumetric mass transfer coefficient in a stirred tank bioreactor once cells start growing inside the reactor?

I am currently working on hydrodynamics of stirred tank reactors for cell cultures and we are calculating the kLa and I want to know how can we exactly calculate kLa once cells start growing...

02 March 2018 6,906 46 View

What is the best method of determining the volumetric mass transfer coefficient while the cells are growing inside the reactor?

I am working on the E.coli cell culture trying to study the impact of rheology on the mass transfer coefficient in a stirred tank reactor. What is the best method of determining the kLa at...

01 February 2018 4,491 5 View

Is there anybody working on the CFD simulation of stirred tank reactors? Please let me know?

I am actually simulating the stirred tank reactor using CFD. I am using the Ansys Fluent to carry out the simulations. I am able to carry out the simulations for the single phase (water). However,...

11 December 2017 5,155 11 View

Is there anyone working on the Rheology of the cell cultures. Please let me know?

Anybody working in this field

11 December 2017 4,107 7 View

Is there anyone working on the Rheology of the cell cultures. Please let me know?

Anyone working in this field

11 December 2017 9,366 0 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

What is the difference between genotype and haplotype data in the ped format?

Hi everybody In the ped format for genotype, alleles of any SNP are represented by two columns (one for each allele, separated by a space). Is a column sufficient for the haplotype to...

27 February 2021 1,965 1 View

Is there an open source free software for text mining and sentiment analysis?

I am looking for a free software for text mining and sentiment analysis for my research on customer review mining (it involves calculating polarity of attributes,opinion oriented information...

25 February 2021 1,920 6 View

What software programs can directly simulate Additive Manufacturing Directed Energy Deposition (DED)?

I understand there are a lot of software programs that can simulate DED by going through specific modeling, simulation, and commands. For me, that was time consuming and results were not accurate....

24 February 2021 4,428 3 View