How do I select an appropriate optimization tool?

I am performing a CFD study in "Ansys Fluent" where some 5-10 parameters are to be optimized. I can see a list of optimization tools provided by Ansys Workbench as integrated tools. How do i...

06 July 2018 751 5 View

How to reduce friction/viscous drag?

From the texts on vehicle aerodynamics, i have learned that a better shape of a car can reduce the pressure drag involved. What can be done to reduce the viscous drag?

05 June 2018 1,670 5 View

What is "Cell Active Area" in a PEMFC?

In the literature, most of the authors mentions the active area of the fuel cell being investigated. Is the area bounded with the red box (see attached image) the effective/active area of a PEMFC...

11 December 2017 9,277 0 View

How to calculate the drag coefficient from a 2D geometry

05 June 2017 3,155 7 View

Can a PEM fuel cell give it's maximum power at 3V?

Usually, researchers draw an IV curve to study the performance of a pemfc. I have two questions in that. Is that only to find the peak power (I x V) point to operate the cell at the particular...

07 August 2016 533 2 View

In a 100% humidified hydrogen, what would be the mass of water molecules per unit mass of hydrogen?

My CFD simulation requires a humidified (mixed species H2 & H2O) hydrogen supply at a boundary in which the mass flow (without humidification) of hydrogen to be supplied is predetermined. I...

04 May 2016 4,736 5 View

How to define a gas species inlet boundary condition with (RH) Relative Humidity in fluent?

My CFD simulation (in fluent) requires a boundary condition in which a humidified gas species should be supplied on a boundary in a fixed mass flow rate. How could i specify the humidity of the...

04 May 2016 3,905 2 View

What are the suitable inlet and outlet boundary conditions for a recirculating anode type PEMFC?

I am trying to simulate a single cell recirculating anode (open end anode) PEMFC using Ansys Fluent Fuel cell module. It is recommended by Ansys to keep "mass-flow inlet" for anode & cathode...

03 April 2016 6,344 3 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 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

Is there any test to determine the cardiovascular risk of patients with obesity? from the perspective of obesity?

We found tests to determine cardiovascular risk taking into account lipid profile, blood pressure, age, history of diabetes, other laboratories. But when weight is involved, there is a paradox. I...

02 March 2021 6,036 1 View