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Meeting Minutes 07/03/12


Tom: the pressure drop from gravity is too large. It is by far the largest pressure drop.

There is no elastance in the model

Tom showed Dr Chung the new paper.

Dr Chung: you already have the alveolar pressure

 Tom: yes so this is good, we can combine this with our existing model

Dr Chung: so what do we have at the moment?

 We have the Matlab model

Dr Chung: Just remove the gravity for the pressure drops to put into adrians model.

 Adrian: so at the moment it is just head loss and angle change

Tom: The distribution of the pressure loss from dhillons model doesn’t seem to agree with existing publications

Tom: potentially we could try to fix the 1D model that we already have

Dr Chung: So there is no interaction between 3D and 1D.

Dr Chung: I don’t think it would be worth it to spend time on the harder model as you couldn’t get the existing model right.

 Dr Chung: what part of it isn’t working? We don’t know

Tom: I’m almost tempted to say that the 1D model at the moment is useless

Tom: I think I probably could implement this paper

 I would rather work on this new model.

Dr Chung: perhaps we don’t have any other option other than trying to get the 1D model done

Dr Chung: It takes about a week or two to order a paper

Dr Chung: If 1D doesn’t have any result then we will need to change the introduction.

Dr Chung: If there is any multiscale element then we may have to change this.

Poster talk

We need to put in separate aims and objectives

 The aims are virtual health

 The objectives are the more specific individual parts

Conclusion needs improving: Need to reflect that the individual elements are coming together in the multiscale nature.

Change the upper and lower airways so that they are both stl files

Dr Chung: you don’t have any complete model results?

Dr Chung: For each section, you need to put the message that needs to be taken home. I.e. the section conclusion. The first part is about jet, you need to mention how jet is important.

Dr Chung: say the pressure distribution within the lower airway was predicted correctly.

Dr Chung: particle simulation, these pictures demonstrate the capability of particle simulation

 At the moment it is showing what you have done, but it is important to show the consequences of what you have done.

Conclusion: talk about multi scale modelling, reiterate what you have done. Demonstrated the capability of what you have done. Generalise the results in the conclusion.

Dr Chung: has to be very clear because there is no question and answer sections.


Adrian: just to confirm, in the introduction, you want us to set the scene

Dr Chung: Poster is meant to be final result, so we cant say we will do this or that.


Adrian: Plotted the results from the grid independence test

 Huge jump in the number of cells as the base size goes down

Adrian: was thinking of using either 0.1 or 0.2.

Dominic: No result as of yet for unsteady. The poster implies that he has a result from unsteady

Dr Chung: Particle has to be unsteady

Dominic: Maybe use just upper airways simulation to do unsteady

Dr Chung: you have particle for the upper and lower separately

 Laura: yes

More Poster Talk

Poster improvements: Mention particle colour. Red is where the particles have hit and stuck, blue is where they just bounce off. Remove the colour bar across the bottom.

Can we have the same angle of view for the inflow conditions. The scales need to be the same.

Dom use round values for the pictures

Change the pressure to whole round numbers

The 1D bit needs more explanation: can we have a different result for the 1 D bit. Could we highlight it on the whole model on the left.

For the 1D result, the additional geometry should be added to one existing branch and shown in an image.

Dom: Put the difference between left and right, i.e. 3 and 4 pascals

 Dom: take one figure away and make the other one larger.

Each section needs a punchy line to emphasis the importance of that part.